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ScienceAges 16-18

Electrical power (P = VI)

Use P = VI to calculate electrical power in watts from potential difference and current. Review suitability for your learners before teaching.

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Age band:Ages 13-15Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Electrical power (P = VI)

Take your time. Show your thinking.

  1. 1. A circuit component operates at 21 V with a current of 1 A. Use P = VI to calculate the electrical power.

    +−R
    V = 21 V · I = 1 A

  2. 2. A circuit component operates at 49 V with a current of 12 A. Use P = VI to calculate the electrical power.

    +−R
    V = 49 V · I = 12 A

  3. 3. A circuit component operates at 9 V with a current of 3 A. Use P = VI to calculate the electrical power.

    +−R
    V = 9 V · I = 3 A

  4. 4. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.

    +−R
    V = 40 V · I = 5 A

  5. 5. A circuit component operates at 8 V with a current of 8 A. Use P = VI to calculate the electrical power.

    +−R
    V = 8 V · I = 8 A

  6. 6. A circuit component operates at 40 V with a current of 13 A. Use P = VI to calculate the electrical power.

    +−R
    V = 40 V · I = 13 A

  7. 7. A circuit component operates at 44 V with a current of 14 A. Use P = VI to calculate the electrical power.

    +−R
    V = 44 V · I = 14 A

  8. 8. A circuit component operates at 38 V with a current of 3 A. Use P = VI to calculate the electrical power.

    +−R
    V = 38 V · I = 3 A

  9. 9. A circuit component operates at 18 V with a current of 7 A. Use P = VI to calculate the electrical power.

    +−R
    V = 18 V · I = 7 A

  10. 10. A circuit component operates at 43 V with a current of 10 A. Use P = VI to calculate the electrical power.

    +−R
    V = 43 V · I = 10 A

  11. 11. A circuit component operates at 9 V with a current of 1 A. Use P = VI to calculate the electrical power.

    +−R
    V = 9 V · I = 1 A

  12. 12. A circuit component operates at 31 V with a current of 6 A. Use P = VI to calculate the electrical power.

    +−R
    V = 31 V · I = 6 A
12 questions · Seed 47 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 16-18

Electrical power (P = VI)

Answers and reasoning. Review before teaching.

  1. 1. A circuit component operates at 21 V with a current of 1 A. Use P = VI to calculate the electrical power.

    21 W

    Electrical power P = V × I = 21 × 1 = 21 W.

  2. 2. A circuit component operates at 49 V with a current of 12 A. Use P = VI to calculate the electrical power.

    588 W

    Electrical power P = V × I = 49 × 12 = 588 W.

  3. 3. A circuit component operates at 9 V with a current of 3 A. Use P = VI to calculate the electrical power.

    27 W

    Electrical power P = V × I = 9 × 3 = 27 W.

  4. 4. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.

    200 W

    Electrical power P = V × I = 40 × 5 = 200 W.

  5. 5. A circuit component operates at 8 V with a current of 8 A. Use P = VI to calculate the electrical power.

    64 W

    Electrical power P = V × I = 8 × 8 = 64 W.

  6. 6. A circuit component operates at 40 V with a current of 13 A. Use P = VI to calculate the electrical power.

    520 W

    Electrical power P = V × I = 40 × 13 = 520 W.

  7. 7. A circuit component operates at 44 V with a current of 14 A. Use P = VI to calculate the electrical power.

    616 W

    Electrical power P = V × I = 44 × 14 = 616 W.

  8. 8. A circuit component operates at 38 V with a current of 3 A. Use P = VI to calculate the electrical power.

    114 W

    Electrical power P = V × I = 38 × 3 = 114 W.

  9. 9. A circuit component operates at 18 V with a current of 7 A. Use P = VI to calculate the electrical power.

    126 W

    Electrical power P = V × I = 18 × 7 = 126 W.

  10. 10. A circuit component operates at 43 V with a current of 10 A. Use P = VI to calculate the electrical power.

    430 W

    Electrical power P = V × I = 43 × 10 = 430 W.

  11. 11. A circuit component operates at 9 V with a current of 1 A. Use P = VI to calculate the electrical power.

    9 W

    Electrical power P = V × I = 9 × 1 = 9 W.

  12. 12. A circuit component operates at 31 V with a current of 6 A. Use P = VI to calculate the electrical power.

    186 W

    Electrical power P = V × I = 31 × 6 = 186 W.

12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 16-18

Electrical power (P = VI)

Take your time. Show your thinking.

  1. 1. A circuit component operates at 21 V with a current of 1 A. Use P = VI to calculate the electrical power.

    +−R
    V = 21 V · I = 1 A

  2. 2. A circuit component operates at 49 V with a current of 12 A. Use P = VI to calculate the electrical power.

    +−R
    V = 49 V · I = 12 A

  3. 3. A circuit component operates at 9 V with a current of 3 A. Use P = VI to calculate the electrical power.

    +−R
    V = 9 V · I = 3 A

  4. 4. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.

    +−R
    V = 40 V · I = 5 A

  5. 5. A circuit component operates at 8 V with a current of 8 A. Use P = VI to calculate the electrical power.

    +−R
    V = 8 V · I = 8 A

  6. 6. A circuit component operates at 40 V with a current of 13 A. Use P = VI to calculate the electrical power.

    +−R
    V = 40 V · I = 13 A

  7. 7. A circuit component operates at 44 V with a current of 14 A. Use P = VI to calculate the electrical power.

    +−R
    V = 44 V · I = 14 A

  8. 8. A circuit component operates at 38 V with a current of 3 A. Use P = VI to calculate the electrical power.

    +−R
    V = 38 V · I = 3 A

  9. 9. A circuit component operates at 18 V with a current of 7 A. Use P = VI to calculate the electrical power.

    +−R
    V = 18 V · I = 7 A

  10. 10. A circuit component operates at 43 V with a current of 10 A. Use P = VI to calculate the electrical power.

    +−R
    V = 43 V · I = 10 A

  11. 11. A circuit component operates at 9 V with a current of 1 A. Use P = VI to calculate the electrical power.

    +−R
    V = 9 V · I = 1 A

  12. 12. A circuit component operates at 31 V with a current of 6 A. Use P = VI to calculate the electrical power.

    +−R
    V = 31 V · I = 6 A
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 16-18

Electrical power (P = VI)

Answers and reasoning. Review before teaching.

  1. 1. A circuit component operates at 21 V with a current of 1 A. Use P = VI to calculate the electrical power.

    21 W

    Electrical power P = V × I = 21 × 1 = 21 W.

  2. 2. A circuit component operates at 49 V with a current of 12 A. Use P = VI to calculate the electrical power.

    588 W

    Electrical power P = V × I = 49 × 12 = 588 W.

  3. 3. A circuit component operates at 9 V with a current of 3 A. Use P = VI to calculate the electrical power.

    27 W

    Electrical power P = V × I = 9 × 3 = 27 W.

  4. 4. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.

    200 W

    Electrical power P = V × I = 40 × 5 = 200 W.

  5. 5. A circuit component operates at 8 V with a current of 8 A. Use P = VI to calculate the electrical power.

    64 W

    Electrical power P = V × I = 8 × 8 = 64 W.

  6. 6. A circuit component operates at 40 V with a current of 13 A. Use P = VI to calculate the electrical power.

    520 W

    Electrical power P = V × I = 40 × 13 = 520 W.

  7. 7. A circuit component operates at 44 V with a current of 14 A. Use P = VI to calculate the electrical power.

    616 W

    Electrical power P = V × I = 44 × 14 = 616 W.

  8. 8. A circuit component operates at 38 V with a current of 3 A. Use P = VI to calculate the electrical power.

    114 W

    Electrical power P = V × I = 38 × 3 = 114 W.

  9. 9. A circuit component operates at 18 V with a current of 7 A. Use P = VI to calculate the electrical power.

    126 W

    Electrical power P = V × I = 18 × 7 = 126 W.

  10. 10. A circuit component operates at 43 V with a current of 10 A. Use P = VI to calculate the electrical power.

    430 W

    Electrical power P = V × I = 43 × 10 = 430 W.

  11. 11. A circuit component operates at 9 V with a current of 1 A. Use P = VI to calculate the electrical power.

    9 W

    Electrical power P = V × I = 9 × 1 = 9 W.

  12. 12. A circuit component operates at 31 V with a current of 6 A. Use P = VI to calculate the electrical power.

    186 W

    Electrical power P = V × I = 31 × 6 = 186 W.

12 questions · Seed 47 · Age guidance, not curriculum certification