ScienceAges 13-15

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 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 13-15

Electrical power (P = VI)

Take your time. Show your thinking.

1. A circuit component operates at 38 V with a current of 9 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 9 A
2. A circuit component operates at 22 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 22 V · I = 7 A
3. A circuit component operates at 9 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 9 V · I = 2 A
4. A circuit component operates at 32 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 8 A
5. A circuit component operates at 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 7 A
6. A circuit component operates at 28 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 28 V · I = 11 A
7. A circuit component operates at 6 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 6 V · I = 8 A
8. A circuit component operates at 31 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 11 A
9. A circuit component operates at 30 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 30 V · I = 2 A
10. A circuit component operates at 26 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 1 A
11. A circuit component operates at 19 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 15 A
12. A circuit component operates at 5 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 15 A

12 questions · Seed 43 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Electrical power (P = VI)

Answers and reasoning. Review before teaching.

1. A circuit component operates at 38 V with a current of 9 A. Use P = VI to calculate the electrical power.
342 W
Electrical power P = V × I = 38 × 9 = 342 W.
2. A circuit component operates at 22 V with a current of 7 A. Use P = VI to calculate the electrical power.
154 W
Electrical power P = V × I = 22 × 7 = 154 W.
3. A circuit component operates at 9 V with a current of 2 A. Use P = VI to calculate the electrical power.
18 W
Electrical power P = V × I = 9 × 2 = 18 W.
4. A circuit component operates at 32 V with a current of 8 A. Use P = VI to calculate the electrical power.
256 W
Electrical power P = V × I = 32 × 8 = 256 W.
5. A circuit component operates at 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
273 W
Electrical power P = V × I = 39 × 7 = 273 W.
6. A circuit component operates at 28 V with a current of 11 A. Use P = VI to calculate the electrical power.
308 W
Electrical power P = V × I = 28 × 11 = 308 W.
7. A circuit component operates at 6 V with a current of 8 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 6 × 8 = 48 W.
8. A circuit component operates at 31 V with a current of 11 A. Use P = VI to calculate the electrical power.
341 W
Electrical power P = V × I = 31 × 11 = 341 W.
9. A circuit component operates at 30 V with a current of 2 A. Use P = VI to calculate the electrical power.
60 W
Electrical power P = V × I = 30 × 2 = 60 W.
10. A circuit component operates at 26 V with a current of 1 A. Use P = VI to calculate the electrical power.
26 W
Electrical power P = V × I = 26 × 1 = 26 W.
11. A circuit component operates at 19 V with a current of 15 A. Use P = VI to calculate the electrical power.
285 W
Electrical power P = V × I = 19 × 15 = 285 W.
12. A circuit component operates at 5 V with a current of 15 A. Use P = VI to calculate the electrical power.
75 W
Electrical power P = V × I = 5 × 15 = 75 W.

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Electrical power (P = VI)

Take your time. Show your thinking.

1. A circuit component operates at 38 V with a current of 9 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 9 A
2. A circuit component operates at 22 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 22 V · I = 7 A
3. A circuit component operates at 9 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 9 V · I = 2 A
4. A circuit component operates at 32 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 8 A
5. A circuit component operates at 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 7 A
6. A circuit component operates at 28 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 28 V · I = 11 A
7. A circuit component operates at 6 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 6 V · I = 8 A
8. A circuit component operates at 31 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 11 A
9. A circuit component operates at 30 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 30 V · I = 2 A
10. A circuit component operates at 26 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 1 A
11. A circuit component operates at 19 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 15 A
12. A circuit component operates at 5 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 15 A

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Electrical power (P = VI)

Answers and reasoning. Review before teaching.

1. A circuit component operates at 38 V with a current of 9 A. Use P = VI to calculate the electrical power.
342 W
Electrical power P = V × I = 38 × 9 = 342 W.
2. A circuit component operates at 22 V with a current of 7 A. Use P = VI to calculate the electrical power.
154 W
Electrical power P = V × I = 22 × 7 = 154 W.
3. A circuit component operates at 9 V with a current of 2 A. Use P = VI to calculate the electrical power.
18 W
Electrical power P = V × I = 9 × 2 = 18 W.
4. A circuit component operates at 32 V with a current of 8 A. Use P = VI to calculate the electrical power.
256 W
Electrical power P = V × I = 32 × 8 = 256 W.
5. A circuit component operates at 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
273 W
Electrical power P = V × I = 39 × 7 = 273 W.
6. A circuit component operates at 28 V with a current of 11 A. Use P = VI to calculate the electrical power.
308 W
Electrical power P = V × I = 28 × 11 = 308 W.
7. A circuit component operates at 6 V with a current of 8 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 6 × 8 = 48 W.
8. A circuit component operates at 31 V with a current of 11 A. Use P = VI to calculate the electrical power.
341 W
Electrical power P = V × I = 31 × 11 = 341 W.
9. A circuit component operates at 30 V with a current of 2 A. Use P = VI to calculate the electrical power.
60 W
Electrical power P = V × I = 30 × 2 = 60 W.
10. A circuit component operates at 26 V with a current of 1 A. Use P = VI to calculate the electrical power.
26 W
Electrical power P = V × I = 26 × 1 = 26 W.
11. A circuit component operates at 19 V with a current of 15 A. Use P = VI to calculate the electrical power.
285 W
Electrical power P = V × I = 19 × 15 = 285 W.
12. A circuit component operates at 5 V with a current of 15 A. Use P = VI to calculate the electrical power.
75 W
Electrical power P = V × I = 5 × 15 = 75 W.

12 questions · Seed 43 · Age guidance, not curriculum certification