Pengertian Energi Listrik dan Cara Mengihitung Energi Listrik

Pengertian Energi Listrik

Energi (kerja) listrik merupakan jumlah daya listrik yang dikonsumsi atau diserap oleh beban kelistrikan dalam waktu.

Satuan waktu dapat dinyatakan dalam detik (second) atau dalam jam (hour).


Rumus Menghitung Energi Listrik

Energi listrik dapat dihitung dengan menggunakan rumus :

W = P x t

Atau

W = V x I x t

Atau

W = I² x R x t

Atau

W = V² / R x t

Keterangan :

  • W adalah kerja listrik dengan satuan Ws (jangan artikan W sebagai Watt) 
  • P adalah daya listrik dengan satuan Watt
  • t adalah waktu dengan satuan s
  • V adalah tegangan dengan satuan Volt
  • R adalah hambatan dengan satuan Ohm (Ω)
  • I adalah kuat arus dengan satuan Ampere

Satuan turunan daya listrik

  • 1 Wh (Watt hours) = 3600 Ws (Watt second)
  • 1 kWh (kilo Watt hours) = 1000 Wh (Watt hours)
  • 1 kWh (kilo Watt hours) = 3.600.000 Ws (Watt Second)


Contoh Perhitungan Energi Listrik

Contoh soal 1

Perhatikan gambar di bawah ini, Hitunglah energi listrik yang digunakan jika diketahui sumber tegangan 12 Volt, arus yang mengalir ke lampu 5 Ampere dan waktu yang digunakan untuk menyalakan lampu selama 30 s.


Jawab

Jika diketahui tegangan (V), Arus (I) dan waktu (t), maka kita gunakan rumus :

W = V x I x t

Kemudian kita masukkan ke dalam rumus :

W = 12 x 5 x 30 = 1.800 Ws atau 0,5 Wh 


Contoh soal 2

Berapakah energi listrik yang digunakan pada lampu yang memiliki daya 50 Watt yang dinyalakan dalam 10 menit ?

Jawab

Jika diketahui Daya lampu (Watt) dan waktu (t), maka kita gunakan rumus :

W = P x t

Sebelumnya, untuk waktu kita konversikan menjadi detik sehingga 10 menit = 600 second

Kemudian kita masukkan ke dalam rumus :

W = 50 x 600 = 30.000 Ws atau 8,3 Wh


Contoh soal 3

Perhatikan gambar di bawah ini, Hitunglah energi listrik yang digunakan jika diketahui arus yang mengalir ke lampu 5 Ampere, hambatan lampu 10 Ω dan waktu yang digunakan untuk menyalakan lampu selama 1 jam.


Jawab

Jika diketahui kuat arus (I), Hambatan beban (R) dan waktu (t), maka kita gunakan rumus :

W = I² x R x t

Kemudian kita masukkan ke dalam rumus :

W = 5² x 10 x 1 = 250 Wh

7 Responses to "Pengertian Energi Listrik dan Cara Mengihitung Energi Listrik"

  1. David Sigalingging, S.Pd14 October 2020 at 21:57

    https://pakgalingging.blogspot.com/2020/10/cara-memeriksa-komponen-sistem-kontrol.html

    ReplyDelete
  2. Monnika Jacob24 November 2020 at 18:58

    By 2030, furnace oil will significantly reduce electricity production, which could lead to a massive energy crisis. What alternatives can we use to end the energy crisis? Dissertation Writing Services

    ReplyDelete
  3. Farah Sultan4 December 2020 at 13:55

    According to the Masters Dissertation Help In Dubai We can define Electric Energy as "A universal source of energy that can be observed in positively and negatively aspects that happens naturally
    in lightning or we can see in a generator and expresses itself in forms of electron motion and interaction"

    ReplyDelete
  4. PVA GO4 February 2021 at 16:11

    This article discussesBuy Facebook accounts the importance of this blog for business promotion. Promoting a blog is just like promoting any other website and can be difficult to do if you are not sure what needs to be done, but with the right tips and tricks, this doesn't have to be. Hopefully, you find this article on this blog helpful and decide to visit the site below to see just what they are talking about...

    ReplyDelete
  5. Sheikh Alya19 May 2021 at 17:19

    Hey, I would like to thank you for the knowledge you shared about electrical energy, It helped me with my assignment. I was working on my assignment which was for MBA Assignment Help Dubai, And your blog helped me with this. So I will keep looking for more on your blogs, as you are very helpful.

    ReplyDelete
  6. RAR Energy18 July 2022 at 19:25

    Reliable and Renewable Energy, we’re on a mission to enable everyone to get clean, affordable, and reliable energy from the sun. We drive the transition to a sustainable, reliable and affordable energy. Our solar programs encompass a broad range of material sourcing and services. We can help you fulfill your energy needs by providing the greatest quality product and service, whether you need solar electricity for your home, business, or farm. The increase in extreme weather events and rising sea levels are unmistakable signs of climate change. Roughly 850 million people still live without access to electricity, which is the foundation of sustainable development.

    ReplyDelete
  7. Conyjohn2 December 2022 at 18:17

    I got opportune to visit this expo when I was invited as a guest speaker and there, As I'm one of the most experienced Academic writer at thesis writing service online UAE

    ReplyDelete