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 3 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 3 V · I = 6 A
2. A circuit component operates at 15 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 15 V · I = 8 A
3. A circuit component operates at 43 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 43 V · I = 2 A
4. A circuit component operates at 39 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 14 A
5. A circuit component operates at 5 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 2 A
6. A circuit component operates at 33 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 33 V · I = 2 A
7. A circuit component operates at 43 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 43 V · I = 3 A
8. 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
9. A circuit component operates at 47 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 47 V · I = 14 A
10. A circuit component operates at 17 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 17 V · I = 2 A
11. A circuit component operates at 46 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 46 V · I = 7 A
12. A circuit component operates at 21 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 21 V · I = 12 A

12 questions · Seed 45 · 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 3 V with a current of 6 A. Use P = VI to calculate the electrical power.
18 W
Electrical power P = V × I = 3 × 6 = 18 W.
2. A circuit component operates at 15 V with a current of 8 A. Use P = VI to calculate the electrical power.
120 W
Electrical power P = V × I = 15 × 8 = 120 W.
3. A circuit component operates at 43 V with a current of 2 A. Use P = VI to calculate the electrical power.
86 W
Electrical power P = V × I = 43 × 2 = 86 W.
4. A circuit component operates at 39 V with a current of 14 A. Use P = VI to calculate the electrical power.
546 W
Electrical power P = V × I = 39 × 14 = 546 W.
5. A circuit component operates at 5 V with a current of 2 A. Use P = VI to calculate the electrical power.
10 W
Electrical power P = V × I = 5 × 2 = 10 W.
6. A circuit component operates at 33 V with a current of 2 A. Use P = VI to calculate the electrical power.
66 W
Electrical power P = V × I = 33 × 2 = 66 W.
7. A circuit component operates at 43 V with a current of 3 A. Use P = VI to calculate the electrical power.
129 W
Electrical power P = V × I = 43 × 3 = 129 W.
8. 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.
9. A circuit component operates at 47 V with a current of 14 A. Use P = VI to calculate the electrical power.
658 W
Electrical power P = V × I = 47 × 14 = 658 W.
10. A circuit component operates at 17 V with a current of 2 A. Use P = VI to calculate the electrical power.
34 W
Electrical power P = V × I = 17 × 2 = 34 W.
11. A circuit component operates at 46 V with a current of 7 A. Use P = VI to calculate the electrical power.
322 W
Electrical power P = V × I = 46 × 7 = 322 W.
12. A circuit component operates at 21 V with a current of 12 A. Use P = VI to calculate the electrical power.
252 W
Electrical power P = V × I = 21 × 12 = 252 W.

12 questions · Seed 45 · 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 3 V with a current of 6 A. Use P = VI to calculate the electrical power.
V = 3 V · I = 6 A
2. A circuit component operates at 15 V with a current of 8 A. Use P = VI to calculate the electrical power.
V = 15 V · I = 8 A
3. A circuit component operates at 43 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 43 V · I = 2 A
4. A circuit component operates at 39 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 39 V · I = 14 A
5. A circuit component operates at 5 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 2 A
6. A circuit component operates at 33 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 33 V · I = 2 A
7. A circuit component operates at 43 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 43 V · I = 3 A
8. 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
9. A circuit component operates at 47 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 47 V · I = 14 A
10. A circuit component operates at 17 V with a current of 2 A. Use P = VI to calculate the electrical power.
V = 17 V · I = 2 A
11. A circuit component operates at 46 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 46 V · I = 7 A
12. A circuit component operates at 21 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 21 V · I = 12 A

12 questions · Seed 45 · 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 3 V with a current of 6 A. Use P = VI to calculate the electrical power.
18 W
Electrical power P = V × I = 3 × 6 = 18 W.
2. A circuit component operates at 15 V with a current of 8 A. Use P = VI to calculate the electrical power.
120 W
Electrical power P = V × I = 15 × 8 = 120 W.
3. A circuit component operates at 43 V with a current of 2 A. Use P = VI to calculate the electrical power.
86 W
Electrical power P = V × I = 43 × 2 = 86 W.
4. A circuit component operates at 39 V with a current of 14 A. Use P = VI to calculate the electrical power.
546 W
Electrical power P = V × I = 39 × 14 = 546 W.
5. A circuit component operates at 5 V with a current of 2 A. Use P = VI to calculate the electrical power.
10 W
Electrical power P = V × I = 5 × 2 = 10 W.
6. A circuit component operates at 33 V with a current of 2 A. Use P = VI to calculate the electrical power.
66 W
Electrical power P = V × I = 33 × 2 = 66 W.
7. A circuit component operates at 43 V with a current of 3 A. Use P = VI to calculate the electrical power.
129 W
Electrical power P = V × I = 43 × 3 = 129 W.
8. 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.
9. A circuit component operates at 47 V with a current of 14 A. Use P = VI to calculate the electrical power.
658 W
Electrical power P = V × I = 47 × 14 = 658 W.
10. A circuit component operates at 17 V with a current of 2 A. Use P = VI to calculate the electrical power.
34 W
Electrical power P = V × I = 17 × 2 = 34 W.
11. A circuit component operates at 46 V with a current of 7 A. Use P = VI to calculate the electrical power.
322 W
Electrical power P = V × I = 46 × 7 = 322 W.
12. A circuit component operates at 21 V with a current of 12 A. Use P = VI to calculate the electrical power.
252 W
Electrical power P = V × I = 21 × 12 = 252 W.

12 questions · Seed 45 · Age guidance, not curriculum certification