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Current, voltage and resistance (V = IR)

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-PS3-1 · England: KS3 Physics: Electricity and electromagnetism (current electricity), KS4 Combined Science: Electricity

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  1. Question 1

    A 12 V battery drives a current of 4 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  2. Question 2

    A current of 3 A flows through a 20 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  3. Question 3

    A 7.5 V supply is connected across a 5 Ω resistor. What current flows, in A?

    AnswerA

  4. Question 4

    A 12 V battery drives a current of 0.5 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  5. Question 5

    A current of 0.5 A flows through a 5 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  6. Question 6

    A 4 V supply is connected across a 8 Ω resistor. What current flows, in A?

    AnswerA

  7. Question 7

    A 12 V battery drives a current of 2 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  8. Question 8

    A current of 4 A flows through a 2 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  9. Question 9

    A 4 V supply is connected across a 4 Ω resistor. What current flows, in A?

    AnswerA

  10. Question 10

    A 12 V battery drives a current of 2 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  11. Question 11

    A current of 1.5 A flows through a 5 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  12. Question 12

    A 9 V supply is connected across a 6 Ω resistor. What current flows, in A?

    AnswerA

  13. Question 13

    A 10 V battery drives a current of 2 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  14. Question 14

    A current of 2 A flows through a 2 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  15. Question 15

    A 10 V supply is connected across a 5 Ω resistor. What current flows, in A?

    AnswerA

  16. Question 16

    A 1.5 V battery drives a current of 0.25 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

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  1. 3 Ω
  2. 60 V
  3. 1.5 A
  4. 24 Ω
  5. 2.5 V
  6. 0.5 A
  7. 6 Ω
  8. 8 V
  9. 1 A
  10. 6 Ω
  11. 7.5 V
  12. 1.5 A
  13. 5 Ω
  14. 4 V
  15. 2 A
  16. 6 Ω