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 4 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 12 A
2. A circuit component operates at 49 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 49 V · I = 5 A
3. A circuit component operates at 12 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 12 V · I = 12 A
4. A circuit component operates at 5 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 1 A
5. 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
6. A circuit component operates at 40 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 1 A
7. A circuit component operates at 47 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 47 V · I = 1 A
8. A circuit component operates at 19 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 2 A
9. A circuit component operates at 37 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 37 V · I = 5 A
10. A circuit component operates at 5 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 11 A
11. A circuit component operates at 36 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 36 V · I = 12 A
12. A circuit component operates at 20 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 20 V · I = 15 A

12 questions · Seed 104734 · 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 4 V with a current of 12 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 4 × 12 = 48 W.
2. A circuit component operates at 49 V with a current of 5 A. Use P = VI to calculate the electrical power.
245 W
Electrical power P = V × I = 49 × 5 = 245 W.
3. A circuit component operates at 12 V with a current of 12 A. Use P = VI to calculate the electrical power.
144 W
Electrical power P = V × I = 12 × 12 = 144 W.
4. A circuit component operates at 5 V with a current of 1 A. Use P = VI to calculate the electrical power.
5 W
Electrical power P = V × I = 5 × 1 = 5 W.
5. 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.
6. A circuit component operates at 40 V with a current of 1 A. Use P = VI to calculate the electrical power.
40 W
Electrical power P = V × I = 40 × 1 = 40 W.
7. A circuit component operates at 47 V with a current of 1 A. Use P = VI to calculate the electrical power.
47 W
Electrical power P = V × I = 47 × 1 = 47 W.
8. A circuit component operates at 19 V with a current of 2 A. Use P = VI to calculate the electrical power.
38 W
Electrical power P = V × I = 19 × 2 = 38 W.
9. A circuit component operates at 37 V with a current of 5 A. Use P = VI to calculate the electrical power.
185 W
Electrical power P = V × I = 37 × 5 = 185 W.
10. A circuit component operates at 5 V with a current of 11 A. Use P = VI to calculate the electrical power.
55 W
Electrical power P = V × I = 5 × 11 = 55 W.
11. A circuit component operates at 36 V with a current of 12 A. Use P = VI to calculate the electrical power.
432 W
Electrical power P = V × I = 36 × 12 = 432 W.
12. A circuit component operates at 20 V with a current of 15 A. Use P = VI to calculate the electrical power.
300 W
Electrical power P = V × I = 20 × 15 = 300 W.

12 questions · Seed 104734 · 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 4 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 12 A
2. A circuit component operates at 49 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 49 V · I = 5 A
3. A circuit component operates at 12 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 12 V · I = 12 A
4. A circuit component operates at 5 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 1 A
5. 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
6. A circuit component operates at 40 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 40 V · I = 1 A
7. A circuit component operates at 47 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 47 V · I = 1 A
8. A circuit component operates at 19 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 19 V · I = 2 A
9. A circuit component operates at 37 V with a current of 5 A. Use P = VI to calculate the electrical power.
V = 37 V · I = 5 A
10. A circuit component operates at 5 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 11 A
11. A circuit component operates at 36 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 36 V · I = 12 A
12. A circuit component operates at 20 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 20 V · I = 15 A

12 questions · Seed 104734 · 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 4 V with a current of 12 A. Use P = VI to calculate the electrical power.
48 W
Electrical power P = V × I = 4 × 12 = 48 W.
2. A circuit component operates at 49 V with a current of 5 A. Use P = VI to calculate the electrical power.
245 W
Electrical power P = V × I = 49 × 5 = 245 W.
3. A circuit component operates at 12 V with a current of 12 A. Use P = VI to calculate the electrical power.
144 W
Electrical power P = V × I = 12 × 12 = 144 W.
4. A circuit component operates at 5 V with a current of 1 A. Use P = VI to calculate the electrical power.
5 W
Electrical power P = V × I = 5 × 1 = 5 W.
5. 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.
6. A circuit component operates at 40 V with a current of 1 A. Use P = VI to calculate the electrical power.
40 W
Electrical power P = V × I = 40 × 1 = 40 W.
7. A circuit component operates at 47 V with a current of 1 A. Use P = VI to calculate the electrical power.
47 W
Electrical power P = V × I = 47 × 1 = 47 W.
8. A circuit component operates at 19 V with a current of 2 A. Use P = VI to calculate the electrical power.
38 W
Electrical power P = V × I = 19 × 2 = 38 W.
9. A circuit component operates at 37 V with a current of 5 A. Use P = VI to calculate the electrical power.
185 W
Electrical power P = V × I = 37 × 5 = 185 W.
10. A circuit component operates at 5 V with a current of 11 A. Use P = VI to calculate the electrical power.
55 W
Electrical power P = V × I = 5 × 11 = 55 W.
11. A circuit component operates at 36 V with a current of 12 A. Use P = VI to calculate the electrical power.
432 W
Electrical power P = V × I = 36 × 12 = 432 W.
12. A circuit component operates at 20 V with a current of 15 A. Use P = VI to calculate the electrical power.
300 W
Electrical power P = V × I = 20 × 15 = 300 W.

12 questions · Seed 104734 · Age guidance, not curriculum certification