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Power and energy in circuits (P = I²R, E = QV)

10th grade (Year 11 in England) · 16 questions · Common Core: NGSS.HS-PS3-1 · England: GCSE Combined Science: Electricity (energy transfers)

Name

Date

Score/ 16

  1. Question 1

    A 2 Ω heating element transfers 18 W. What current flows through it, in A?

    AnswerA

  2. Question 2

    200 C of charge passes through a potential difference of 6 V. How much energy is transferred, in J?

    AnswerJ

  3. Question 3

    A current of 2 A flows through a 20 Ω resistor. What power is transferred, in W?

    AnswerW

  4. Question 4

    A 20 Ω heating element transfers 320 W. What current flows through it, in A?

    AnswerA

  5. Question 5

    100 C of charge passes through a potential difference of 230 V. How much energy is transferred, in J?

    AnswerJ

  6. Question 6

    A current of 0.5 A flows through a 5 Ω resistor. What power is transferred, in W?

    AnswerW

  7. Question 7

    A 20 Ω heating element transfers 180 W. What current flows through it, in A?

    AnswerA

  8. Question 8

    20 C of charge passes through a potential difference of 230 V. How much energy is transferred, in J?

    AnswerJ

  9. Question 9

    A current of 1 A flows through a 10 Ω resistor. What power is transferred, in W?

    AnswerW

  10. Question 10

    A 2 Ω heating element transfers 50 W. What current flows through it, in A?

    AnswerA

  11. Question 11

    50 C of charge passes through a potential difference of 9 V. How much energy is transferred, in J?

    AnswerJ

  12. Question 12

    A current of 4 A flows through a 4 Ω resistor. What power is transferred, in W?

    AnswerW

  13. Question 13

    A 2 Ω heating element transfers 32 W. What current flows through it, in A?

    AnswerA

  14. Question 14

    20 C of charge passes through a potential difference of 12 V. How much energy is transferred, in J?

    AnswerJ

  15. Question 15

    A current of 2 A flows through a 10 Ω resistor. What power is transferred, in W?

    AnswerW

  16. Question 16

    A 10 Ω heating element transfers 160 W. What current flows through it, in A?

    AnswerA

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Answer key: Power and energy in circuits (P = I²R, E = QV)

  1. 1. 3 A

  2. 2. 1200 J

  3. 3. 80 W

  4. 4. 4 A

  5. 5. 23000 J

  6. 6. 1.25 W

  7. 7. 3 A

  8. 8. 4600 J

  9. 9. 10 W

  10. 10. 5 A

  11. 11. 450 J

  12. 12. 64 W

  13. 13. 4 A

  14. 14. 240 J

  15. 15. 40 W

  16. 16. 4 A