Artikel Fisika kelas 9 ini akan membahas tentang listrik statis serta kaitannya dengan peristiwa terjadinya petir. Mari kita belajar bersama!
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Siapa yang masih ingat adegan waktu Thor, Groot, dan Rocket Raccoon mendarat di Wakanda? Keren banget ya! Apalagi kedatangan mereka dibuat lebih dramatis karena ada petir dari palu barunya Thor.
Di film sih keren, tapi kamu tau nggak kalau di dunia nyata, petir adalah peristiwa alam yang sangat ditakuti oleh banyak orang. Selain karena kilatannya, petir juga memiliki suara yang dahsyat.
Di sisi lain, petir juga sangat berbahaya karena jika seseorang tersambar petir, maka badannya akan terbakar. Aduh… Serem ya?! Nggak heran kan kalau ada banyak orang yang takut petir.
Ngomong-ngomong soal petir, yang sering kita lihat di dunia nyata asalnya bukan dari palu Thor, ya! Petir terjadi karena gesekan antar awan yang melahirkan elektron-elektron bebas. Elektron? Apaan tuh?
Jadi, petir adalah salah satu peristiwa yang berkaitan dengan listrik statis. Sebelum kamu pusing mikirin petir, apalagi mikirin Thor, sekarang kita belajar listrik statis sama-sama, yuk!
Pengertian Listrik Statis
Listrik statis adalah cabang ilmu fisika yang mempelajari fenomena kelistrikan pada muatan-muatan listrik yang diam (statis).
Fenomena listrik statis ini, timbul saat benda-benda bermuatan listrik saling berinteraksi (bergesekan), yang menyebabkan salah satu benda mendapatkan muatan lebih dan benda lain kehilangan muatan. Akibatnya:
- Benda yang kehilangan elektron akan menjadi bermuatan positif.
- Benda yang menerima elektron akan menjadi bermuatan negatif.
Nah, pernah nggak kamu merasa seperti terkejut atau sedikit kesetrum saat menyentuh gagang pintu? Itu terjadi karena tubuhmu telah mengumpulkan muatan listrik, biasanya berupa muatan negatif (elektron).
Ketika tanganmu menyentuh gagang pintu yang terbuat dari logam (bahan yang mudah menghantarkan listrik), muatan listrik dari tubuhmu meloncat ke gagang pintu.
Lompatan muatan ini berlangsung sangat cepat, dan itu membuatmu merasa seperti tersengat listrik.
Baca Juga: Pengertian Listrik Dinamis, Komponen, dan Contoh Penerapannya
Perbedaan Listrik Statis dengan Listrik Dinamis
Selain listrik statis, ada juga yang namanya listrik dinamis. Bedanya apa ya? Berikut penjelasannya!
Aspek
Listrik Statis
Listrik Dinamis
Definisi
Listrik statis muatannya tidak mengalir (statis), tetapi menumpuk pada permukaan benda, karena adanya perpindahan muatan.
Listrik dinamis muatannya mengalir terus-menerus melalu penghantar seperti kabel.
Pergerakan Muatan
Muatannya diam dan tidak berpindah.
Muatannya bergerak dalam suatu rangkaian.
Sumber
Terjadi karena interaksi berupa gesekan antar dua benda.
Terjadi karena aliran sumber listrik, seperti baterai atau pembangkit listrik.
Kapan bisa Terjadi?
Umumnya terjadi sesaat, sampai muatan selesai dilepaskan atau dinetralkan.
Terjadi terus-menerus selama ada sumber listrik dan dalam rangkaian tertutup.
Apakah Memerlukan Konduktor?
Tidak selalu. Bisa terjadi pada benda-benda yang bersifat isolator, seperti balon dan rambut.
Membutuhkan konduktor seperti kabel tembaga untuk mengalirkan arus listrik.
Contoh Fenomena
Terjadinya fenomena petir, rasa kesetrum saat menyentuh benda-benda yang terbuat dari logam, rambut yang berdiri saat digosokkan ke balon/penggaris.
Barang-barang elektronik yang menyala dari sumber listrik (arus listrik PLN atau baterai)
Muatan Listrik
Kamu pernah dengar istilah atom? Atom merupakan suatu dasar materi yang terdiri atas inti atom dan kulit atom. Partikel-partikel penyusun atom adalah:
Inti atom terdiri dari proton dan neutron, sementara kulit atom terdiri dari elektron yang mengelilingi bagian inti pada lintasan tertentu.
Nah, elektron yang ada di kulit atom ini bisa bebas berpindah nih, dari satu atom ke atom lainnya. Saat elektron dari atom sebuah benda berpindah ke atom benda lain, maka akan terjadi ketidakseimbangan jumlah elektron di kedua benda tersebut. Sehingga, akan menyebabkan perbedaan muatan listrik pada kedua bendanya.
Secara nggak langsung, hal ini ngasih tau ke kita kalau ternyata muatan listrik pada benda-benda itu bergantung dari jumlah elektronnya.
Sebuah benda dikatakan bermuatan netral apabila jumlah elektronnya sama dengan jumlah protonnya, dikatakan bermuatan positif apabila jumlah elektronnya lebih sedikit (kekurangan) daripada jumlah protonnya, dan dikatakan bermuatan negatif jika jumlah elektronnya lebih banyak (berlebih) daripada jumlah protonnya.
Dari sifat-sifat tersebut, dapat memungkinkan terjadi interaksi. Interaksi tersebut bisa jadi tarik-menarik atau tolak-menolak.
Oh iya, pada tahun 1785, Charles Augustin de Coulomb menemukan hukum dasar tentang gaya listrik antara dua partikel bermuatan yang berbunyi:
“Besarnya gaya tarik menarik atau tolak menolak antara dua benda bermuatan listrik berbanding lurus dengan besar muatan masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda tersebut”.
Hukum ini dikenal dengan Hukum Coulomb. Kamu bisa melihat penjelasannya di artikel Pengertian Hukum Coulomb.
Baca Juga: Memahami Konsep Medan Listrik: Sifat, Rumus, dan Contohnya
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Apakah kamu sudah mulai paham dengan materi listrik statis? Kalo masih ada poin-poin yang belum kamu mengerti, mending belajar sama ahlinya, deh. Belajar bareng kakak-kakak pengajar di Ruangguru Privat Fisika misalnya.
Belajar nggak cuma menyenangkan, tapi kamu juga bakal diajari konsepnya sampai paham! Para pengajar di Ruangguru Privat juga sudah terstandarisasi kualitasnya, loh. Kamu juga bisa pilih nih, mau diajarkan secara langsung (offline) atau daring (online). Fleksibel, kan? Untuk info lebih lanjut, cuss klik link berikut!
Cara Membuat Benda Bermuatan Listrik
Ada tiga cara untuk memberi muatan pada listrik statis, yaitu penggosokan, konduksi dan induksi. Penjelasannya kita lanjut di bawah ya.
1. Penggosokan
Benda-benda di bawah ini dapat memiliki muatan listrik dengan cara digosok dengan benda lain. Simak tabel di bawah ini.
2. Konduksi
Cara yang kedua adalah dengan konduksi. Apa itu konduksi? Konduksi adalah mendekatkan benda yang bermuatan listrik ke benda yang tidak bermuatan listrik. Dengan begitu, benda yang tadinya tidak memiliki muatan listrik akan memiliki muatan listrik.
3. Induksi
Terakhir adalah dengan induksi yaitu memisahkan muatan listrik di dalam suatu penghantar. Caranya adalah dengan mendekatkan benda yang bermuatan listrik ke benda lain yang berada dalam kondisi netral.
Peristiwa konduksi ini sering ditemui saat kita sedang menyelidiki muatan listrik suatu benda menggunakan elektroskop.
Tadi, di awal artikel sudah dikasih gambaran sedikit tentang fenomena alam yang sering terjadi di sekitar kita, kan? Ya, petir. Petir merupakan salah satu fenomena alam terkait listrik statis yang bisa kita saksikan. Yuk, kita bahas sedikit lagi tentang fenomena listrik statis tersebut.
Contoh Listrik Statis dalam Kehidupan Sehari-hari
Fisika pasti ada di mana-mana dan kapan saja, termasuk juga dengan fenomena listrik statis ini. Salah satunya adalah petir yang kita sebut di awal artikel tadi. Bukan petirnya Thor yaa, tapi petir yang sering kita lihat. Petir bisa terjadi karena awan yang bergesekan satu sama lain.
Setelah proses pergesekan, terbentuklah elektron-elektron bebas yang kemudian saling berkumpul, sehingga memiliki cukup beda potensial untuk menyambar permukaan bumi. Saking berbahayanya petir, kini dibuat alat penangkal petir yang biasa dipasang di bangunan-bangunan tinggi.
Cara kerja alat penangkal petir ini adalah dengan mengalirkan petirnya ke dalam tanah melalui jalur yang tersedia. Jadi, petir yang menyambar di antara bangunan-bangunan tinggi tidak akan membahayakan bangunan serta penghuninya karena ada pemindahan muatan listrik.
Baca Juga: Siapakah Penemu Listrik? Benjamin Franklin atau Michael Faraday
Selain petir dan penangkalnya, fenomena listrik statis yang lain adalah ketika kita mendekatkan punggung tangan ke televisi yang baru saja dimatikan. Seketika tangan kita akan terasa disetrum oleh layar televisi tersebut. Ada juga rambut kering yang ketika disisir dengan sisir plastik, lalu jika sisir tersebut didekatkan ke kertas kecil-kecil, kertas tersebut akan menempel ke sisir plastik.
Wah, banyak juga ya penjelasan tentang listrik statis serta kaitannya dengan kehidupan sehari-hari. Sekarang kalian juga jadi tau kan kalau petir itu asalnya bukan dari Thor, tapi dari listrik statis. Supaya kalian lebih paham lagi, yuk kerjakan latihan soal tentang listrik statis di ruangbelajar!
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<h1 class="content-title">
Pengertian Listrik Statis, Muatan, Sumber & Contoh Fenomenanya | Fisika Kelas 9 </h1>
<div class="content-meta">
<p class="content-author"><a href="https://www.ruangguru.com/blog/author/shabrina-zakaria" class="">Shabrina Zakaria</a> </p>
<p class="content-info"><span>October 24, 2024 • </span> <span>6 minutes read</span></p>
<br />
</div>
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<p style="text-align: justify;"><img decoding="async" style="width: 820px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-02.jpg" alt="Kenapa Petir bisa Terjadi" width="820" /></p>
<blockquote>
<p style="text-align: center;"><em><strong><a href="https://www.ruangguru.com/blog/c/fisika/fisika-smp-kelas-9">Artikel Fisika kelas 9</a></strong> ini akan membahas tentang <strong>listrik statis</strong> serta kaitannya dengan peristiwa terjadinya petir. Mari kita belajar bersama!</em></p>
</blockquote>
<p style="text-align: center;"><em>—</em></p>
<p> </p>
<p style="text-align: justify;">Siapa yang masih ingat adegan waktu Thor, Groot, dan Rocket Raccoon mendarat di Wakanda? Keren banget ya! Apalagi kedatangan mereka dibuat lebih dramatis karena ada petir dari palu barunya Thor.</p>
<p style="text-align: justify;">Di film sih keren, tapi kamu tau nggak kalau di dunia nyata, petir adalah peristiwa alam yang sangat ditakuti oleh banyak orang. Selain karena kilatannya, petir juga memiliki suara yang dahsyat.</p>
<p style="text-align: justify;">Di sisi lain, petir juga sangat berbahaya karena jika seseorang tersambar petir, maka badannya akan terbakar. Aduh… Serem ya?! Nggak heran kan kalau ada banyak orang yang takut petir.</p>
<p style="text-align: justify;">Ngomong-ngomong soal petir, yang sering kita lihat di dunia nyata asalnya bukan dari palu Thor, ya! Petir terjadi karena gesekan antar awan yang melahirkan elektron-elektron bebas. Elektron? Apaan tuh?</p>
<p style="text-align: justify;">Jadi, petir adalah salah satu peristiwa yang berkaitan dengan <strong>listrik statis</strong>. Sebelum kamu pusing mikirin petir, apalagi mikirin Thor, sekarang kita belajar listrik statis sama-sama, yuk!</p>
<p> </p>
<h2><span style="font-size: 18pt;">Pengertian Listrik Statis</span></h2>
<p style="text-align: justify;"><strong>Listrik statis adalah</strong> cabang ilmu fisika yang mempelajari fenomena kelistrikan pada <strong>muatan-muatan listrik yang diam (statis)</strong>.</p>
<p style="text-align: justify;">Fenomena listrik statis ini, <strong>timbul</strong> <strong>saat benda-benda bermuatan listrik saling berinteraksi (bergesekan)</strong>, yang menyebabkan <strong>salah satu benda mendapatkan muatan lebih</strong> dan benda lain kehilangan muatan. Akibatnya:</p>
<ul>
<li>Benda yang <strong>kehilangan elektron</strong> akan menjadi <strong>bermuatan positif</strong>.</li>
<li>Benda yang <strong>menerima elektron</strong> akan menjadi <strong>bermuatan negatif</strong>.</li>
</ul>
<p> </p>
<p style="text-align: justify;">Nah, pernah nggak kamu merasa seperti terkejut atau sedikit kesetrum saat menyentuh gagang pintu? Itu terjadi karena tubuhmu telah mengumpulkan muatan listrik, biasanya berupa muatan negatif (elektron).</p>
<p style="text-align: justify;">Ketika tanganmu menyentuh gagang pintu yang terbuat dari logam (bahan yang mudah menghantarkan listrik), muatan listrik dari tubuhmu meloncat ke gagang pintu.</p>
<p style="text-align: justify;">Lompatan muatan ini berlangsung sangat cepat, dan itu membuatmu merasa seperti tersengat listrik.</p>
<p><strong>Baca Juga: <a href="https://www.ruangguru.com/blog/ipa-kelas-9-penerapan-listrik-dinamis-di-sekitar-kita">Pengertian Listrik Dinamis, Komponen, dan Contoh Penerapannya</a></strong></p>
<p> </p>
<h2><span style="font-size: 18pt;">Perbedaan Listrik Statis dengan Listrik Dinamis</span></h2>
<p style="text-align: justify;">Selain listrik statis, ada juga yang namanya listrik dinamis. Bedanya apa ya? Berikut penjelasannya!</p>
<table style="border-collapse: collapse; width: 100%;">
<tbody>
<tr>
<td style="width: 33.3333%; text-align: center;"><strong>Aspek</strong></td>
<td style="width: 33.3333%; text-align: center;"><strong>Listrik Statis</strong></td>
<td style="width: 33.3333%; text-align: center;"><strong>Listrik Dinamis</strong></td>
</tr>
<tr>
<td style="width: 33.3333%;">Definisi</td>
<td style="width: 33.3333%;">Listrik statis muatannya tidak mengalir (statis), tetapi menumpuk pada permukaan benda, karena adanya perpindahan muatan.</td>
<td style="width: 33.3333%;">Listrik dinamis muatannya mengalir terus-menerus melalu penghantar seperti kabel.</td>
</tr>
<tr>
<td style="width: 33.3333%;">Pergerakan Muatan</td>
<td style="width: 33.3333%;">Muatannya diam dan tidak berpindah.</td>
<td style="width: 33.3333%;">Muatannya bergerak dalam suatu rangkaian.</td>
</tr>
<tr>
<td style="width: 33.3333%;">Sumber</td>
<td style="width: 33.3333%;">Terjadi karena interaksi berupa gesekan antar dua benda.</td>
<td style="width: 33.3333%;">Terjadi karena aliran sumber listrik, seperti baterai atau pembangkit listrik.</td>
</tr>
<tr>
<td style="width: 33.3333%;">Kapan bisa Terjadi?</td>
<td style="width: 33.3333%;">Umumnya terjadi sesaat, sampai muatan selesai dilepaskan atau dinetralkan.</td>
<td style="width: 33.3333%;">Terjadi terus-menerus selama ada sumber listrik dan dalam rangkaian tertutup.</td>
</tr>
<tr>
<td style="width: 33.3333%;">Apakah Memerlukan Konduktor?</td>
<td style="width: 33.3333%;">Tidak selalu. Bisa terjadi pada benda-benda yang bersifat isolator, seperti balon dan rambut.</td>
<td style="width: 33.3333%;">Membutuhkan konduktor seperti kabel tembaga untuk mengalirkan arus listrik.</td>
</tr>
<tr>
<td style="width: 33.3333%;">Contoh Fenomena</td>
<td style="width: 33.3333%;">Terjadinya fenomena petir, rasa kesetrum saat menyentuh benda-benda yang terbuat dari logam, rambut yang berdiri saat digosokkan ke balon/penggaris.</td>
<td style="width: 33.3333%;">Barang-barang elektronik yang menyala dari sumber listrik (arus listrik PLN atau baterai)</td>
</tr>
</tbody>
</table>
<p> </p>
<h2><span style="font-size: 18pt;">Muatan Listrik</span></h2>
<p style="text-align: justify;">Kamu pernah dengar istilah atom? <strong><a href="/blog/atom-molekul-dan-ion" rel="noopener">Atom</a> </strong>merupakan suatu dasar materi yang terdiri atas inti atom dan kulit atom. Partikel-partikel penyusun atom adalah:</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-03.jpg" alt="partikel penyusun atom" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Inti atom terdiri dari proton dan neutron, sementara kulit atom terdiri dari elektron yang mengelilingi bagian inti pada lintasan tertentu.</p>
<p style="text-align: justify;">Nah, elektron yang ada di kulit atom ini bisa bebas berpindah nih, dari satu atom ke atom lainnya. Saat elektron dari atom sebuah benda berpindah ke atom benda lain, maka akan terjadi ketidakseimbangan jumlah elektron di kedua benda tersebut. Sehingga, akan menyebabkan perbedaan muatan listrik pada kedua bendanya.</p>
<p style="text-align: justify;">Secara nggak langsung, hal ini ngasih tau ke kita kalau ternyata muatan listrik pada benda-benda itu bergantung dari jumlah elektronnya.</p>
<p style="text-align: justify;">Sebuah benda dikatakan <strong>bermuatan netral</strong> apabila jumlah elektronnya <strong>sama dengan</strong> jumlah protonnya, dikatakan <strong>bermuatan positif</strong> apabila jumlah elektronnya<strong> lebih sedikit (kekurangan) </strong>daripada jumlah protonnya, dan dikatakan <strong>bermuatan negatif</strong> jika jumlah elektronnya <strong>lebih banyak (berlebih)</strong> daripada jumlah protonnya.</p>
<p style="text-align: justify; font-size: 16px;">Dari sifat-sifat tersebut, dapat memungkinkan terjadi interaksi. Interaksi tersebut bisa jadi tarik-menarik atau tolak-menolak.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-04.jpg" alt="Hukum Coulomb" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Oh iya, pada tahun 1785, Charles Augustin de Coulomb menemukan hukum dasar tentang gaya listrik antara dua partikel bermuatan yang berbunyi:</p>
<blockquote>
<p style="text-align: center;">“Besarnya gaya tarik menarik atau tolak menolak antara dua benda bermuatan listrik berbanding lurus dengan besar muatan masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda tersebut”.</p>
</blockquote>
<p style="text-align: justify;">Hukum ini dikenal dengan Hukum Coulomb. Kamu bisa melihat penjelasannya di artikel<strong> </strong><a href="/blog/pengertian-hukum-coulomb" rel="noopener"><strong>Pengertian Hukum </strong><span style="font-weight: bold;">Coulomb</span></a>.</p>
<p><strong>Baca Juga: <a href="https://www.ruangguru.com/blog/medan-listrik-fisika-smp-kelas-9">Memahami Konsep Medan Listrik: Sifat, Rumus, dan Contohnya</a></strong></p>
<p style="text-align: center;">—</p>
<p style="text-align: justify;">Apakah kamu sudah mulai paham dengan materi listrik statis? Kalo masih ada poin-poin yang belum kamu mengerti, mending belajar sama ahlinya, deh. Belajar bareng kakak-kakak pengajar di <a href="https://www.ruangguru.com/privat/fisika"><strong>Ruangguru Privat Fisika</strong></a> misalnya.</p>
<p style="text-align: justify;">Belajar nggak cuma menyenangkan, tapi kamu juga bakal diajari konsepnya sampai paham! Para pengajar di Ruangguru Privat juga sudah terstandarisasi kualitasnya, loh. Kamu juga bisa pilih nih, mau diajarkan secara langsung (<em>offline</em>) atau daring (<em>online</em>). Fleksibel, kan? Untuk info lebih lanjut, cuss klik link berikut!</p>
<p><a href="https://cta.ruangguru.com/blog-rg-10-privat-b"><img decoding="async" class="aligncenter size-medium" src="https://cdn-web-2.ruangguru.com/landing-pages/assets/84b6f2c7-9c9c-480d-a218-7961334af9ce.png" alt="CTA Ruangguru Privat" /></a></p>
<p> </p>
<h2><span style="font-size: 18pt;">Cara Membuat Benda Bermuatan Listrik</span></h2>
<p style="text-align: justify;"><span style="background-color: transparent;">Ada tiga cara untuk memberi muatan pada listrik statis, yaitu <strong>penggosokan, konduksi dan induksi</strong>. Penjelasannya kita lanjut di bawah </span>ya<span style="background-color: transparent;">.</span></p>
<p> </p>
<h3><span style="font-size: 14pt;">1. Penggosokan</span></h3>
<p style="text-align: justify;">Benda-benda di bawah ini dapat memiliki muatan listrik dengan cara digosok dengan benda lain. Simak tabel di bawah ini.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-06.jpg" alt="tabel muatan listrik bahan-bahan" width="600" /></p>
<p> </p>
<h3><span style="font-size: 14pt;">2. Konduksi</span></h3>
<p style="text-align: justify;">Cara yang kedua adalah dengan konduksi. Apa itu konduksi? Konduksi adalah <strong>mendekatkan benda yang bermuatan listrik ke benda yang tidak bermuatan listrik</strong>. Dengan begitu, benda yang tadinya tidak memiliki muatan listrik akan memiliki muatan listrik.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-07.jpg" alt="konduksi" width="600" /></p>
<p> </p>
<h3><span style="font-size: 14pt;">3. Induksi</span></h3>
<p style="text-align: justify;">Terakhir adalah dengan induksi yaitu <strong>memisahkan muatan listrik di dalam suatu penghantar</strong>. Caranya adalah dengan mendekatkan benda yang bermuatan listrik ke benda lain yang berada dalam kondisi netral.</p>
<p style="text-align: justify;">Peristiwa konduksi ini sering ditemui saat kita sedang menyelidiki muatan listrik suatu benda menggunakan elektroskop.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-08.jpg" alt="induksi" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Tadi, di awal artikel sudah dikasih gambaran sedikit tentang fenomena alam yang sering terjadi di sekitar kita, kan? Ya, petir. Petir merupakan salah satu fenomena alam terkait listrik statis yang bisa kita saksikan. Yuk, kita bahas sedikit lagi tentang fenomena listrik statis tersebut.</p>
<p> </p>
<h2><span style="font-size: 18pt;">Contoh Listrik Statis dalam Kehidupan Sehari-hari</span></h2>
<p style="text-align: justify;">Fisika pasti ada di mana-mana dan kapan saja, termasuk juga dengan fenomena listrik statis ini. Salah satunya adalah petir yang kita sebut di awal artikel tadi. Bukan petirnya Thor yaa, tapi petir yang sering kita lihat. Petir bisa terjadi karena awan yang bergesekan satu sama lain.</p>
<p style="text-align: justify;">Setelah proses pergesekan, terbentuklah elektron-elektron bebas yang kemudian saling berkumpul, sehingga memiliki cukup beda potensial untuk menyambar permukaan bumi. Saking berbahayanya petir, kini dibuat alat penangkal petir yang biasa dipasang di bangunan-bangunan tinggi.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-09.jpg" alt="penemu penangkal petir" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Cara kerja alat penangkal petir ini adalah dengan mengalirkan petirnya ke dalam tanah melalui jalur yang tersedia. Jadi, petir yang menyambar di antara bangunan-bangunan tinggi tidak akan membahayakan bangunan serta penghuninya karena ada pemindahan muatan listrik.</p>
<p><strong>Baca Juga: <a href="/blog/sejarah-penemuan-listrik" rel="noopener">Siapakah Penemu Listrik? Benjamin Franklin atau Michael Faraday</a></strong></p>
<p style="text-align: justify;">Selain petir dan penangkalnya, fenomena listrik statis yang lain adalah ketika kita mendekatkan punggung tangan ke televisi yang baru saja dimatikan. Seketika tangan kita akan terasa disetrum oleh layar televisi tersebut. Ada juga rambut kering yang ketika disisir dengan sisir plastik, lalu jika sisir tersebut didekatkan ke kertas kecil-kecil, kertas tersebut akan menempel ke sisir plastik.</p>
<p><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Kenapa%20Petir%20bisa%20Terjadi%20-%20%20Fisika%209-10.jpg" alt="penerapan listrik statis di kehidupan sehari-hari" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Wah, banyak juga ya penjelasan tentang listrik statis serta kaitannya dengan kehidupan sehari-hari. Sekarang kalian juga jadi tau kan kalau petir itu asalnya bukan dari Thor, tapi dari listrik statis. Supaya kalian lebih paham lagi, yuk kerjakan latihan soal tentang listrik statis di <strong><a href="https://ruangguru.onelink.me/blPk/eaff0eb9" target="_blank" rel="noopener">ruangbelajar</a></strong>!</p>
<p style="text-align: center;"><span style="background-color: transparent;"><a class="rg-cta" style="text-align: center;" href="https://link.ruangguru.com/blPk/eaff0eb9" target="_blank" rel="noopener"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/cta/0ec4a2df-db2e-4ae1-8473-692756dcb684.jpeg" alt="IDN CTA Blog ruangbelajar Ruangguru" /></a> </span></p>
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<div class="d-lg-none text-center">
<nav class="footer-menu social">
<p class="title">Ikuti Kami</p>
<a target="_blank" href="https://www.instagram.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/instagram.png" loading="lazy" alt="Logo Instagram Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.facebook.com/ruanggurucom/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/facebook.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/facebook.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/facebook.png" loading="lazy" alt="Logo Facebook Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://twitter.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/twitter.png" loading=" lazy" alt="Logo Twitter Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.youtube.com/ruangguru">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/youtube.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/youtube.png" loading=" lazy" alt="Logo Youtube Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.linkedin.com/company/ruangguru-com">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/linkedin.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/linkedin.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/linkedin.png" loading=" lazy" alt="Logo LinkedIn Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.tiktok.com/@ruangguru">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/tiktok.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/tiktok.png" loading=" lazy" alt="Logo TikTok Footer" width="32px" height="32px" />
</picture>
</a>
</nav>
</div>
<p class="footer-copyright">
© 2026 All Rights Reserved PT. Ruang Raya Indonesia
</p>
</div>
<style>
.bantuan-container {
position: relative;
}
.bantuan-element {
position: fixed;
z-index: 999;
display: flex;
align-items: flex-end;
justify-content: flex-end;
cursor: pointer;
transition: all 0.6s ease;
}
.bantuan-top {
bottom: 11rem;
right: 2rem;
}
.bantuan-bottom {
bottom: 2rem;
right: 2rem;
}
.bantuan-top-2 {
bottom: 15rem;
right: 2rem;
}
.bantuan-top-3 {
bottom: 19rem;
right: 2rem;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 2rem;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 2rem;
}
@media (min-width: 768px) {
.bantuan-element img {
width: auto;
transition: all 0.4s ease;
}
.bantuan-top img {
width: 140px;
}
.bantuan-bottom img {
width: 140px;
}
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 140px;
}
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 140px;
}
.bantuan-element.clicked {
bottom: 9rem;
right: 2.5rem;
}
.bantuan-element.clicked img {
width: auto;
height: 64px;
}
}
@media (max-width: 767px) {
.bantuan-top {
bottom: 8rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom {
bottom: 2rem;
right: 1.25rem;
align-items: center;
}
.bantuan-top-2 {
bottom: 12rem;
right: 1rem;
align-items: center;
}
.bantuan-top-3 {
bottom: 16rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 1.25rem;
align-items: center;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 1.25rem;
align-items: center;
}
.bantuan-element img {
width: auto;
}
.bantuan-top img,
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 96px;
}
.bantuan-bottom img,
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 96px;
}
}
.bantuan-element:hover {
transform: scale(1.05);
}
.bantuan-element img {
max-width: 100%;
height: auto;
}
</style>
<div id="bantuan-divs-container" style="position: relative" data-product="ruangguru" data-table="rg_floating_icon"></div>
<script>
class FloatingDivsComponent {
constructor(product = 'ruangguru', table = 'rg_floating_icon') {
this.container = document.getElementById('bantuan-divs-container');
this.floatingElements = [];
this.product = product;
this.table = table;
// Configuration
this.config = {
baseApiUrl: 'https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/rg_banner/views/',
apiKey: 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
maxElements: 2,
zIndexBase: 100,
};
// Build dynamic API URL based on table parameter
this.config.apiUrl = this.buildApiUrl();
this.init();
}
buildApiUrl() {
const baseUrl = this.config.baseApiUrl;
const tableName = this.table || 'rg_floating_icon';
const queryParams =
'offset=0&limit=99999&sort=rankPosition&where=(type,eq,floating)~and(showIn,anyof,blog)~and(hide,is,false)~and(product,eq,' +
this.product +
')&nested%5Bcta%5D%5Bfields%5D=Id,name,ctaId,imageUrl,ctaLink,targetUrl';
return `${baseUrl}${tableName}?${queryParams}`;
}
async init() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to initialize floating divs component:', error);
}
}
async fetchFloatingElements() {
try {
const options = {
method: 'GET',
headers: {
'xc-token': this.config.apiKey || 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
},
};
const urlNoco = this.config.apiUrl;
const response = await fetch(urlNoco, options);
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
this.floatingElements = this.processApiResponse(data);
} catch (error) {
console.error('Error fetching floating elements:', error);
throw error;
}
}
processApiResponse(data) {
if (!data || !data.list || !Array.isArray(data.list)) {
return [];
}
console.log(data.list);
// Ensure we only get maximum 2 elements
const limitedElements = data.list.slice(0, this.config.maxElements);
return limitedElements;
}
renderFloatingElements() {
if (!this.container || this.floatingElements.length === 0) {
return;
}
// Additional safeguard: ensure we never render more than maxElements
const elementsToRender = this.floatingElements.slice(0, this.config.maxElements);
// Clean up existing elements and their event listeners
this.cleanupExistingElements();
// Clear existing content
this.container.innerHTML = '';
elementsToRender.forEach((element, index) => {
const floatingDiv = this.createFloatingDiv(element, index);
this.container.appendChild(floatingDiv);
});
}
cleanupExistingElements() {
// Clear existing elements (no need for event listener cleanup with CSS approach)
const existingElements = this.container.querySelectorAll('[data-floating-element]');
existingElements.forEach(element => {
element.remove();
});
}
createFloatingDiv(element, index) {
const div = document.createElement('div');
const cta = element.cta[0]; // Use the first CTA
// Add data attribute for cleanup tracking
div.setAttribute('data-floating-element', 'true');
// Apply CSS classes based on rankPosition
const positionClass = this.getPositionClass(element.rankPosition, index);
div.className = `bantuan-element ${positionClass}`;
div.style.zIndex = this.config.zIndexBase + index;
// Create the link and image
const link = document.createElement('a');
link.href = 'https://cta.ruangguru.com/' + cta.ctaId || '#';
link.target = '_blank';
// Add tracking attributes
link.setAttribute('data-tracking-event-type', 'landing_page__core__item_click');
link.setAttribute(
'data-tracking-context',
JSON.stringify({
product_name: this.product,
cta_action: 'redirection',
cta_action_detail: link.href,
item_type: 'floating',
item_name: element.name || 'Floating element',
item_category: 'payment',
item_position: index,
item_serial: null,
section_type: 'floating_item',
section_position: 'body',
section_name: 'floating_item',
})
);
const img = document.createElement('img');
img.src = element.imageUrl + '?h=200&convert=webp';
img.alt = element.name || 'Floating element';
img.loading = 'lazy';
// Add click tracking
link.addEventListener('click', () => {
this.trackClick(element, cta);
});
link.appendChild(img);
div.appendChild(link);
return div;
}
getPositionClass(rankPosition, index) {
// Define positioning classes based on rankPosition
if (rankPosition === 1) {
return 'bantuan-top'; // Top position
} else if (rankPosition === 2) {
return 'bantuan-bottom'; // Bottom position
} else {
// For additional elements, distribute them evenly
return `bantuan-${index % 2 === 0 ? 'top' : 'bottom'}-${Math.floor(index / 2) + 1}`;
}
}
trackClick(element, cta) {
// Implement click tracking logic here
console.log('Floating element clicked:', {
elementId: element.Id,
elementName: cta.name,
ctaId: cta.ctaId,
targetUrl: cta.targetUrl,
});
}
// Public method to manually refresh
async refresh() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to refresh floating elements:', error);
throw error;
}
}
// Public method to get current floating elements
getFloatingElements() {
return [...this.floatingElements];
}
}
// Initialize the component when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
// Get product and table parameters from data attributes
const container = document.getElementById('bantuan-divs-container');
const product = container.getAttribute('data-product') || 'ruangguru';
const table = container.getAttribute('data-table') || 'rg_floating_icon';
new FloatingDivsComponent(product, table);
});
// Export for use in other modules if needed
if (typeof module !== 'undefined' && module.exports) {
module.exports = FloatingDivsComponent;
}
</script> <div id="wp-install-nudge" style="
position: fixed;
bottom: 0rem;
right: 0;
z-index: 999;
cursor: pointer;
"></div>
<script>
(function (w, d, s, o, f, js, fjs) {
w['Sales-Nudge-Widget'] = o; w[o] = w[o] || function () { (w[o].q = w[o].q || []).push(arguments) };
js = d.createElement(s), fjs = d.getElementsByTagName(s)[0];
js.id = o; js.src = f; js.async = 1; fjs.parentNode.insertBefore(js, fjs);
}(window, document, 'script', 'wpInstallNudge', 'https://cdn-web-2.ruangguru.com/sales-nudge/6198a95130/dist/widget.js'));
wpInstallNudge('init', { targetElementId: 'wp-install-nudge', clientTarget: 'ruangguru_blog' });
</script>
<script>
// note: disabled due to auto reload page
// var lastScrollTop = 0;
// $(window).scroll(function(event){
// var st = $(this).scrollTop();
// if (st > lastScrollTop){
// $('#wp-install-nudge').slideDown( "slow", function() {});
// } else {
// $('#wp-install-nudge').slideUp( "slow", function() {});
// }
// lastScrollTop = st;
// });
// $(document).ready(function () {
// $("#wp-install-nudge").hide();
// });
$('#wp-install-nudge').click(function(){
Analytics.track("promotion__install_nudge__click",
{
user_email: "ruangguru@blog.com",
cta_link: widgetData.dataConfig.target_link
}).catch((err) => {
console.log("tracker error", err);
});
});
</script>
</footer>
<div id="__next"></div>
<script type="speculationrules">
{"prefetch":[{"source":"document","where":{"and":[{"href_matches":"\/blog\/*"},{"not":{"href_matches":["\/blog\/wp-*.php","\/blog\/wp-admin\/*","\/blog\/wp-content\/uploads\/*","\/blog\/wp-content\/*","\/blog\/wp-content\/plugins\/*","\/blog\/wp-content\/themes\/ruangguru\/*","\/blog\/*\\?(.+)"]}},{"not":{"selector_matches":"a[rel~=\"nofollow\"]"}},{"not":{"selector_matches":".no-prefetch, .no-prefetch a"}}]},"eagerness":"conservative"}]}
</script>
<script>
async function getCtaDetails(ctaIds) {
const endpoint =
" https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/CTA/views/CTA?offset=0&limit=10&where=(ctaId,in," + ctaIds.toString() + ")";
try {
const response = await fetch(endpoint, {
headers: {
"xc-token": "-hG2nBDJzSj0agSgNtcJx97M4F02y54nUMoY6plJ",
},
});
const data = await response.json();
const ctaList = data?.list || [];
const ctaMap = new Map();
for (const ctaData of ctaList) {
ctaMap.set(ctaData.ctaId, ctaData);
}
return ctaMap;
} catch (error) {
console.error("Error fetching CTA details:", error);
return new Map();
}
}
async function replaceCTA() {
const regex = /{{cta\((‘(.*?)’|“(.*?)”)\)}}/g;
const bodyHTML = document.body.innerHTML;
const matches = Array.from(bodyHTML.matchAll(regex));
const ctaIds = matches.map((match) => {
let ctaId = match[2] ?? match[3];
return ctaId;
});
const ctaMap = await getCtaDetails(ctaIds);
const replacedHTML = bodyHTML.replace(regex, (match, _inner, ctaId1, ctaId2) => {
const ctaId = ctaId1 ?? ctaId2;
const ctaData = ctaMap.get(ctaId);
if (ctaData) {
return `<a href="https://cta.ruangguru.com/${ctaData.ctaId}" target="_${ctaData.targetType}" style="position:relative;display:inline-block;">
<img src="${ctaData.imageUrl}" loading="lazy" alt="${ctaData.altText}" />
</a>`;
} else {
return match;
}
});
document.body.innerHTML = replacedHTML;
}
</script>
<meta name="author" content="Ruangguru Tech Team">
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PVNLZFT" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- Tracker -->
<script type="text/javascript" src="https://cdn-web-2.ruangguru.com/landing-page-web/public/staticpages/global-assets/js/cta.js"></script>
<script src="https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.mjs" type="module"></script>
</body>
</html>