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.

New variation Try interactive challenge Browse templates

Age band:Ages 13-15 Ages 16-18

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 16-18

Electrical power (P = VI)

Take your time. Show your thinking.

1. A circuit component operates at 12 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 12 V · I = 1 A
2. A circuit component operates at 20 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 20 V · I = 1 A
3. A circuit component operates at 5 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 10 A
4. A circuit component operates at 38 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 14 A
5. A circuit component operates at 7 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 7 V · I = 4 A
6. A circuit component operates at 25 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 25 V · I = 15 A
7. A circuit component operates at 26 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 12 A
8. A circuit component operates at 9 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 9 V · I = 15 A
9. A circuit component operates at 25 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 25 V · I = 4 A
10. A circuit component operates at 21 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 21 V · I = 3 A
11. 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
12. A circuit component operates at 10 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 7 A

12 questions · Seed 54 · 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 12 V with a current of 1 A. Use P = VI to calculate the electrical power.
12 W
Electrical power P = V × I = 12 × 1 = 12 W.
2. A circuit component operates at 20 V with a current of 1 A. Use P = VI to calculate the electrical power.
20 W
Electrical power P = V × I = 20 × 1 = 20 W.
3. A circuit component operates at 5 V with a current of 10 A. Use P = VI to calculate the electrical power.
50 W
Electrical power P = V × I = 5 × 10 = 50 W.
4. A circuit component operates at 38 V with a current of 14 A. Use P = VI to calculate the electrical power.
532 W
Electrical power P = V × I = 38 × 14 = 532 W.
5. A circuit component operates at 7 V with a current of 4 A. Use P = VI to calculate the electrical power.
28 W
Electrical power P = V × I = 7 × 4 = 28 W.
6. A circuit component operates at 25 V with a current of 15 A. Use P = VI to calculate the electrical power.
375 W
Electrical power P = V × I = 25 × 15 = 375 W.
7. A circuit component operates at 26 V with a current of 12 A. Use P = VI to calculate the electrical power.
312 W
Electrical power P = V × I = 26 × 12 = 312 W.
8. A circuit component operates at 9 V with a current of 15 A. Use P = VI to calculate the electrical power.
135 W
Electrical power P = V × I = 9 × 15 = 135 W.
9. A circuit component operates at 25 V with a current of 4 A. Use P = VI to calculate the electrical power.
100 W
Electrical power P = V × I = 25 × 4 = 100 W.
10. A circuit component operates at 21 V with a current of 3 A. Use P = VI to calculate the electrical power.
63 W
Electrical power P = V × I = 21 × 3 = 63 W.
11. 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.
12. A circuit component operates at 10 V with a current of 7 A. Use P = VI to calculate the electrical power.
70 W
Electrical power P = V × I = 10 × 7 = 70 W.

12 questions · Seed 54 · 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 12 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 12 V · I = 1 A
2. A circuit component operates at 20 V with a current of 1 A. Use P = VI to calculate the electrical power.
V = 20 V · I = 1 A
3. A circuit component operates at 5 V with a current of 10 A. Use P = VI to calculate the electrical power.
V = 5 V · I = 10 A
4. A circuit component operates at 38 V with a current of 14 A. Use P = VI to calculate the electrical power.
V = 38 V · I = 14 A
5. A circuit component operates at 7 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 7 V · I = 4 A
6. A circuit component operates at 25 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 25 V · I = 15 A
7. A circuit component operates at 26 V with a current of 12 A. Use P = VI to calculate the electrical power.
V = 26 V · I = 12 A
8. A circuit component operates at 9 V with a current of 15 A. Use P = VI to calculate the electrical power.
V = 9 V · I = 15 A
9. A circuit component operates at 25 V with a current of 4 A. Use P = VI to calculate the electrical power.
V = 25 V · I = 4 A
10. A circuit component operates at 21 V with a current of 3 A. Use P = VI to calculate the electrical power.
V = 21 V · I = 3 A
11. 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
12. A circuit component operates at 10 V with a current of 7 A. Use P = VI to calculate the electrical power.
V = 10 V · I = 7 A

12 questions · Seed 54 · 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 12 V with a current of 1 A. Use P = VI to calculate the electrical power.
12 W
Electrical power P = V × I = 12 × 1 = 12 W.
2. A circuit component operates at 20 V with a current of 1 A. Use P = VI to calculate the electrical power.
20 W
Electrical power P = V × I = 20 × 1 = 20 W.
3. A circuit component operates at 5 V with a current of 10 A. Use P = VI to calculate the electrical power.
50 W
Electrical power P = V × I = 5 × 10 = 50 W.
4. A circuit component operates at 38 V with a current of 14 A. Use P = VI to calculate the electrical power.
532 W
Electrical power P = V × I = 38 × 14 = 532 W.
5. A circuit component operates at 7 V with a current of 4 A. Use P = VI to calculate the electrical power.
28 W
Electrical power P = V × I = 7 × 4 = 28 W.
6. A circuit component operates at 25 V with a current of 15 A. Use P = VI to calculate the electrical power.
375 W
Electrical power P = V × I = 25 × 15 = 375 W.
7. A circuit component operates at 26 V with a current of 12 A. Use P = VI to calculate the electrical power.
312 W
Electrical power P = V × I = 26 × 12 = 312 W.
8. A circuit component operates at 9 V with a current of 15 A. Use P = VI to calculate the electrical power.
135 W
Electrical power P = V × I = 9 × 15 = 135 W.
9. A circuit component operates at 25 V with a current of 4 A. Use P = VI to calculate the electrical power.
100 W
Electrical power P = V × I = 25 × 4 = 100 W.
10. A circuit component operates at 21 V with a current of 3 A. Use P = VI to calculate the electrical power.
63 W
Electrical power P = V × I = 21 × 3 = 63 W.
11. 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.
12. A circuit component operates at 10 V with a current of 7 A. Use P = VI to calculate the electrical power.
70 W
Electrical power P = V × I = 10 × 7 = 70 W.

12 questions · Seed 54 · Age guidance, not curriculum certification