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 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 7 A
2. A circuit component operates at 31 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 8 A
3. A circuit component operates at 38 V with a current of 13 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 13 A
4. A circuit component operates at 32 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 1 A
5. A circuit component operates at 19 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 4 A
6. A circuit component operates at 42 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 42 V · I = 8 A
7. A circuit component operates at 33 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 33 V · I = 6 A
8. A circuit component operates at 8 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 8 V · I = 4 A
9. A circuit component operates at 32 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 3 A
10. A circuit component operates at 10 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 11 A
11. A circuit component operates at 24 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 24 V · I = 15 A
12. A circuit component operates at 40 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 3 A

12 questions · Seed 49 · 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 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.
2. A circuit component operates at 31 V with a current of 8 A. Use P = VI to calculate the electrical power.
248 W
Electrical power P = V × I = 31 × 8 = 248 W.
3. A circuit component operates at 38 V with a current of 13 A. Use P = VI to calculate the electrical power.
494 W
Electrical power P = V × I = 38 × 13 = 494 W.
4. A circuit component operates at 32 V with a current of 1 A. Use P = VI to calculate the electrical power.
32 W
Electrical power P = V × I = 32 × 1 = 32 W.
5. A circuit component operates at 19 V with a current of 4 A. Use P = VI to calculate the electrical power.
76 W
Electrical power P = V × I = 19 × 4 = 76 W.
6. A circuit component operates at 42 V with a current of 8 A. Use P = VI to calculate the electrical power.
336 W
Electrical power P = V × I = 42 × 8 = 336 W.
7. A circuit component operates at 33 V with a current of 6 A. Use P = VI to calculate the electrical power.
198 W
Electrical power P = V × I = 33 × 6 = 198 W.
8. A circuit component operates at 8 V with a current of 4 A. Use P = VI to calculate the electrical power.
32 W
Electrical power P = V × I = 8 × 4 = 32 W.
9. A circuit component operates at 32 V with a current of 3 A. Use P = VI to calculate the electrical power.
96 W
Electrical power P = V × I = 32 × 3 = 96 W.
10. A circuit component operates at 10 V with a current of 11 A. Use P = VI to calculate the electrical power.
110 W
Electrical power P = V × I = 10 × 11 = 110 W.
11. A circuit component operates at 24 V with a current of 15 A. Use P = VI to calculate the electrical power.
360 W
Electrical power P = V × I = 24 × 15 = 360 W.
12. A circuit component operates at 40 V with a current of 3 A. Use P = VI to calculate the electrical power.
120 W
Electrical power P = V × I = 40 × 3 = 120 W.

12 questions · Seed 49 · 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 39 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 7 A
2. A circuit component operates at 31 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 8 A
3. A circuit component operates at 38 V with a current of 13 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 13 A
4. A circuit component operates at 32 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 1 A
5. A circuit component operates at 19 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 4 A
6. A circuit component operates at 42 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 42 V · I = 8 A
7. A circuit component operates at 33 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 33 V · I = 6 A
8. A circuit component operates at 8 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 8 V · I = 4 A
9. A circuit component operates at 32 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 32 V · I = 3 A
10. A circuit component operates at 10 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 11 A
11. A circuit component operates at 24 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 24 V · I = 15 A
12. A circuit component operates at 40 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 3 A

12 questions · Seed 49 · 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 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.
2. A circuit component operates at 31 V with a current of 8 A. Use P = VI to calculate the electrical power.
248 W
Electrical power P = V × I = 31 × 8 = 248 W.
3. A circuit component operates at 38 V with a current of 13 A. Use P = VI to calculate the electrical power.
494 W
Electrical power P = V × I = 38 × 13 = 494 W.
4. A circuit component operates at 32 V with a current of 1 A. Use P = VI to calculate the electrical power.
32 W
Electrical power P = V × I = 32 × 1 = 32 W.
5. A circuit component operates at 19 V with a current of 4 A. Use P = VI to calculate the electrical power.
76 W
Electrical power P = V × I = 19 × 4 = 76 W.
6. A circuit component operates at 42 V with a current of 8 A. Use P = VI to calculate the electrical power.
336 W
Electrical power P = V × I = 42 × 8 = 336 W.
7. A circuit component operates at 33 V with a current of 6 A. Use P = VI to calculate the electrical power.
198 W
Electrical power P = V × I = 33 × 6 = 198 W.
8. A circuit component operates at 8 V with a current of 4 A. Use P = VI to calculate the electrical power.
32 W
Electrical power P = V × I = 8 × 4 = 32 W.
9. A circuit component operates at 32 V with a current of 3 A. Use P = VI to calculate the electrical power.
96 W
Electrical power P = V × I = 32 × 3 = 96 W.
10. A circuit component operates at 10 V with a current of 11 A. Use P = VI to calculate the electrical power.
110 W
Electrical power P = V × I = 10 × 11 = 110 W.
11. A circuit component operates at 24 V with a current of 15 A. Use P = VI to calculate the electrical power.
360 W
Electrical power P = V × I = 24 × 15 = 360 W.
12. A circuit component operates at 40 V with a current of 3 A. Use P = VI to calculate the electrical power.
120 W
Electrical power P = V × I = 40 × 3 = 120 W.

12 questions · Seed 49 · Age guidance, not curriculum certification