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 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Electrical power (P = VI)

Take your time. Show your thinking.

1. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 5 A
2. A circuit component operates at 10 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 6 A
3. A circuit component operates at 29 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 29 V · I = 10 A
4. A circuit component operates at 31 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 14 A
5. A circuit component operates at 28 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 28 V · I = 12 A
6. A circuit component operates at 50 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 7 A
7. A circuit component operates at 39 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 12 A
8. A circuit component operates at 49 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 49 V · I = 1 A
9. A circuit component operates at 4 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 6 A
10. A circuit component operates at 13 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 13 V · I = 15 A
11. A circuit component operates at 14 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 14 V · I = 10 A
12. A circuit component operates at 24 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 24 V · I = 2 A

12 questions · Seed 46 · 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. 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.
2. A circuit component operates at 10 V with a current of 6 A. Use P = VI to calculate the electrical power.
60 W
Electrical power P = V × I = 10 × 6 = 60 W.
3. A circuit component operates at 29 V with a current of 10 A. Use P = VI to calculate the electrical power.
290 W
Electrical power P = V × I = 29 × 10 = 290 W.
4. A circuit component operates at 31 V with a current of 14 A. Use P = VI to calculate the electrical power.
434 W
Electrical power P = V × I = 31 × 14 = 434 W.
5. A circuit component operates at 28 V with a current of 12 A. Use P = VI to calculate the electrical power.
336 W
Electrical power P = V × I = 28 × 12 = 336 W.
6. A circuit component operates at 50 V with a current of 7 A. Use P = VI to calculate the electrical power.
350 W
Electrical power P = V × I = 50 × 7 = 350 W.
7. A circuit component operates at 39 V with a current of 12 A. Use P = VI to calculate the electrical power.
468 W
Electrical power P = V × I = 39 × 12 = 468 W.
8. A circuit component operates at 49 V with a current of 1 A. Use P = VI to calculate the electrical power.
49 W
Electrical power P = V × I = 49 × 1 = 49 W.
9. A circuit component operates at 4 V with a current of 6 A. Use P = VI to calculate the electrical power.
24 W
Electrical power P = V × I = 4 × 6 = 24 W.
10. A circuit component operates at 13 V with a current of 15 A. Use P = VI to calculate the electrical power.
195 W
Electrical power P = V × I = 13 × 15 = 195 W.
11. A circuit component operates at 14 V with a current of 10 A. Use P = VI to calculate the electrical power.
140 W
Electrical power P = V × I = 14 × 10 = 140 W.
12. A circuit component operates at 24 V with a current of 2 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 24 × 2 = 48 W.

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Electrical power (P = VI)

Take your time. Show your thinking.

1. A circuit component operates at 40 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 5 A
2. A circuit component operates at 10 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 6 A
3. A circuit component operates at 29 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 29 V · I = 10 A
4. A circuit component operates at 31 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 31 V · I = 14 A
5. A circuit component operates at 28 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 28 V · I = 12 A
6. A circuit component operates at 50 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 7 A
7. A circuit component operates at 39 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 12 A
8. A circuit component operates at 49 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 49 V · I = 1 A
9. A circuit component operates at 4 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 6 A
10. A circuit component operates at 13 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 13 V · I = 15 A
11. A circuit component operates at 14 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 14 V · I = 10 A
12. A circuit component operates at 24 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 24 V · I = 2 A

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Electrical power (P = VI)

Answers and reasoning. Review before teaching.

1. 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.
2. A circuit component operates at 10 V with a current of 6 A. Use P = VI to calculate the electrical power.
60 W
Electrical power P = V × I = 10 × 6 = 60 W.
3. A circuit component operates at 29 V with a current of 10 A. Use P = VI to calculate the electrical power.
290 W
Electrical power P = V × I = 29 × 10 = 290 W.
4. A circuit component operates at 31 V with a current of 14 A. Use P = VI to calculate the electrical power.
434 W
Electrical power P = V × I = 31 × 14 = 434 W.
5. A circuit component operates at 28 V with a current of 12 A. Use P = VI to calculate the electrical power.
336 W
Electrical power P = V × I = 28 × 12 = 336 W.
6. A circuit component operates at 50 V with a current of 7 A. Use P = VI to calculate the electrical power.
350 W
Electrical power P = V × I = 50 × 7 = 350 W.
7. A circuit component operates at 39 V with a current of 12 A. Use P = VI to calculate the electrical power.
468 W
Electrical power P = V × I = 39 × 12 = 468 W.
8. A circuit component operates at 49 V with a current of 1 A. Use P = VI to calculate the electrical power.
49 W
Electrical power P = V × I = 49 × 1 = 49 W.
9. A circuit component operates at 4 V with a current of 6 A. Use P = VI to calculate the electrical power.
24 W
Electrical power P = V × I = 4 × 6 = 24 W.
10. A circuit component operates at 13 V with a current of 15 A. Use P = VI to calculate the electrical power.
195 W
Electrical power P = V × I = 13 × 15 = 195 W.
11. A circuit component operates at 14 V with a current of 10 A. Use P = VI to calculate the electrical power.
140 W
Electrical power P = V × I = 14 × 10 = 140 W.
12. A circuit component operates at 24 V with a current of 2 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 24 × 2 = 48 W.

12 questions · Seed 46 · Age guidance, not curriculum certification