Soal Latihan Hukum Ohm

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Soal Latihan Hukum Ohm - Quiz

Setelah kalian belajar Hukum Ohm, mari berlatih mengerjakan soal-soal berikut ini:


Questions and Answers
  • 1. 

    Sebuah lampu dihubungkan dengan listrik yang mempunyai tegangan 12 V. Ketika diukur, ternyata kuat arusnya adalah 0,4 Ampere.a. Tentukan besar hambatan pada lampu tersebut dengan perhitungan berdasarkan Hukum Ohm.b. Berapa nilai arus listrik apabila tegangan yang digunakan 9 Volt?

  • 2. 

    Kamu diharuskan merancang sebuah rangkaian listrik tertutup yang terdiri dari sumber daya berupa baterai dan beban berupa lampu pijar. Kabel pada rangkaian tersebut mampu menghantarkan arus listrik sebesar 2 ampere dan baterai yang dipakai menghasilkan tegangan sebesar 36 volt. Akan tetapi, lampu pijar pada rangkaian tersebut hanya dapat menyala jika dialiri listrik sebesar 24 volt sehingga kamu harus memasang resistor untuk menurunkan tegangan dari baterai. Berapa besar resistansi yang diperlukan pada resistor yang dipakai?

  • 3. 

    Arus listrik mengalir dari ujung penghantar dengan potensial ________ ke potensial ________.

    Explanation
    The correct answer is "tinggi, rendah" because electrical current flows from a higher potential to a lower potential.

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  • 4. 

    Untuk resistensi (R) yang tetap, jika tegangan (V) yang diberikan ke rangkaian dinaikkan, arus listrik (I) yang mengalir akan bertambah banyak.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    According to Ohm's law, the current flowing through a circuit is directly proportional to the voltage applied across it, given that the resistance remains constant. Therefore, if the voltage is increased, the current flowing through the circuit will also increase. This is why the statement is true.

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  • 5. 

    Pernyataan yang tidak sesuai dengan Hukum Ohm yaitu...

    • A.

      Sumber tegangan tidak mempengaruhi nilai arus listrik.

    • B.

      Semakin besar nilai sumber tegangan, maka semakin kecil pula jumlah arus yang mengalir.

    • C.

      Jika tidak terdapat beda potensial, arus listrik tetap dapat mengalir pada rangkaian.

    • D.

      Jika hambatan diperbesar, maka aliran arus yang mengalir pada rangkaian akan bertambah.

    Correct Answer(s)
    B. Semakin besar nilai sumber tegangan, maka semakin kecil pula jumlah arus yang mengalir.
    D. Jika hambatan diperbesar, maka aliran arus yang mengalir pada rangkaian akan bertambah.
    Explanation
    The statement "Semakin besar nilai sumber tegangan, maka semakin kecil pula jumlah arus yang mengalir" is not in accordance with Ohm's Law. According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor. Therefore, if the voltage increases, the current should also increase, not decrease. Similarly, the statement "Jika hambatan diperbesar, maka aliran arus yang mengalir pada rangkaian akan bertambah" is also incorrect. According to Ohm's Law, if the resistance increases, the current should decrease, not increase.

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  • 6. 

    Salah satu syarat agar arus listrik dapat mengalir dalam suatu hambatan tertutup adalah...

    • A.

      Terdapat hambatan

    • B.

      Terdapat beda potensial di antara dua titik.

    • C.

      Dipasang sakelar.

    • D.

      Dipasang sumber tegangan sehingga potensialnya menjadi sama.

    Correct Answer
    B. Terdapat beda potensial di antara dua titik.
    Explanation
    To allow electric current to flow in a closed circuit, there must be a potential difference (or voltage) between two points. This potential difference creates an electric field that pushes the charged particles (electrons) through the circuit, causing the flow of electric current. Without a potential difference, there would be no driving force for the electrons to move, and thus no current would flow. Therefore, the presence of a potential difference between two points is a necessary condition for electric current to flow in a closed circuit.

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  • Current Version
  • Jul 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 04, 2017
    Quiz Created by
    Indahsetyaningru
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