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 35 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 35 V · I = 12 A
2. A circuit component operates at 3 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 3 V · I = 11 A
3. A circuit component operates at 8 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 8 V · I = 10 A
4. A circuit component operates at 50 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 4 A
5. A circuit component operates at 42 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 42 V · I = 15 A
6. A circuit component operates at 26 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 11 A
7. A circuit component operates at 4 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 10 A
8. A circuit component operates at 4 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 7 A
9. A circuit component operates at 5 V with a current of 9 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 9 A
10. A circuit component operates at 50 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 10 A
11. A circuit component operates at 7 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 7 V · I = 7 A
12. A circuit component operates at 30 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 30 V · I = 10 A

12 questions · Seed 104731 · 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 35 V with a current of 12 A. Use P = VI to calculate the electrical power.
420 W
Electrical power P = V × I = 35 × 12 = 420 W.
2. A circuit component operates at 3 V with a current of 11 A. Use P = VI to calculate the electrical power.
33 W
Electrical power P = V × I = 3 × 11 = 33 W.
3. A circuit component operates at 8 V with a current of 10 A. Use P = VI to calculate the electrical power.
80 W
Electrical power P = V × I = 8 × 10 = 80 W.
4. A circuit component operates at 50 V with a current of 4 A. Use P = VI to calculate the electrical power.
200 W
Electrical power P = V × I = 50 × 4 = 200 W.
5. A circuit component operates at 42 V with a current of 15 A. Use P = VI to calculate the electrical power.
630 W
Electrical power P = V × I = 42 × 15 = 630 W.
6. A circuit component operates at 26 V with a current of 11 A. Use P = VI to calculate the electrical power.
286 W
Electrical power P = V × I = 26 × 11 = 286 W.
7. A circuit component operates at 4 V with a current of 10 A. Use P = VI to calculate the electrical power.
40 W
Electrical power P = V × I = 4 × 10 = 40 W.
8. A circuit component operates at 4 V with a current of 7 A. Use P = VI to calculate the electrical power.
28 W
Electrical power P = V × I = 4 × 7 = 28 W.
9. A circuit component operates at 5 V with a current of 9 A. Use P = VI to calculate the electrical power.
45 W
Electrical power P = V × I = 5 × 9 = 45 W.
10. A circuit component operates at 50 V with a current of 10 A. Use P = VI to calculate the electrical power.
500 W
Electrical power P = V × I = 50 × 10 = 500 W.
11. A circuit component operates at 7 V with a current of 7 A. Use P = VI to calculate the electrical power.
49 W
Electrical power P = V × I = 7 × 7 = 49 W.
12. A circuit component operates at 30 V with a current of 10 A. Use P = VI to calculate the electrical power.
300 W
Electrical power P = V × I = 30 × 10 = 300 W.

12 questions · Seed 104731 · 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 35 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 35 V · I = 12 A
2. A circuit component operates at 3 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 3 V · I = 11 A
3. A circuit component operates at 8 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 8 V · I = 10 A
4. A circuit component operates at 50 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 4 A
5. A circuit component operates at 42 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 42 V · I = 15 A
6. A circuit component operates at 26 V with a current of 11 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 11 A
7. A circuit component operates at 4 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 10 A
8. A circuit component operates at 4 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 4 V · I = 7 A
9. A circuit component operates at 5 V with a current of 9 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 9 A
10. A circuit component operates at 50 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 50 V · I = 10 A
11. A circuit component operates at 7 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 7 V · I = 7 A
12. A circuit component operates at 30 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 30 V · I = 10 A

12 questions · Seed 104731 · 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 35 V with a current of 12 A. Use P = VI to calculate the electrical power.
420 W
Electrical power P = V × I = 35 × 12 = 420 W.
2. A circuit component operates at 3 V with a current of 11 A. Use P = VI to calculate the electrical power.
33 W
Electrical power P = V × I = 3 × 11 = 33 W.
3. A circuit component operates at 8 V with a current of 10 A. Use P = VI to calculate the electrical power.
80 W
Electrical power P = V × I = 8 × 10 = 80 W.
4. A circuit component operates at 50 V with a current of 4 A. Use P = VI to calculate the electrical power.
200 W
Electrical power P = V × I = 50 × 4 = 200 W.
5. A circuit component operates at 42 V with a current of 15 A. Use P = VI to calculate the electrical power.
630 W
Electrical power P = V × I = 42 × 15 = 630 W.
6. A circuit component operates at 26 V with a current of 11 A. Use P = VI to calculate the electrical power.
286 W
Electrical power P = V × I = 26 × 11 = 286 W.
7. A circuit component operates at 4 V with a current of 10 A. Use P = VI to calculate the electrical power.
40 W
Electrical power P = V × I = 4 × 10 = 40 W.
8. A circuit component operates at 4 V with a current of 7 A. Use P = VI to calculate the electrical power.
28 W
Electrical power P = V × I = 4 × 7 = 28 W.
9. A circuit component operates at 5 V with a current of 9 A. Use P = VI to calculate the electrical power.
45 W
Electrical power P = V × I = 5 × 9 = 45 W.
10. A circuit component operates at 50 V with a current of 10 A. Use P = VI to calculate the electrical power.
500 W
Electrical power P = V × I = 50 × 10 = 500 W.
11. A circuit component operates at 7 V with a current of 7 A. Use P = VI to calculate the electrical power.
49 W
Electrical power P = V × I = 7 × 7 = 49 W.
12. A circuit component operates at 30 V with a current of 10 A. Use P = VI to calculate the electrical power.
300 W
Electrical power P = V × I = 30 × 10 = 300 W.

12 questions · Seed 104731 · Age guidance, not curriculum certification