ScienceAges 13-15

Ohm’s law

Use V = IR to calculate voltage from current and resistance in a simple circuit. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 8 A and has resistance 8 Ω. Use V = IR to find the voltage.
I = 8 A · R = 8 Ω
2. A resistor carries 1 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 1 A · R = 50 Ω
3. A resistor carries 1 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 1 A · R = 21 Ω
4. A resistor carries 2 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 2 A · R = 41 Ω
5. A resistor carries 4 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 4 A · R = 43 Ω
6. A resistor carries 6 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 6 A · R = 5 Ω
7. A resistor carries 11 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 11 A · R = 23 Ω
8. A resistor carries 1 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 1 A · R = 11 Ω
9. A resistor carries 6 A and has resistance 32 Ω. Use V = IR to find the voltage.
I = 6 A · R = 32 Ω
10. A resistor carries 12 A and has resistance 27 Ω. Use V = IR to find the voltage.
I = 12 A · R = 27 Ω
11. A resistor carries 4 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 4 A · R = 50 Ω
12. A resistor carries 9 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 9 A · R = 46 Ω

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

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 8 A and has resistance 8 Ω. Use V = IR to find the voltage.
64 V
V = I × R = 8 × 8 = 64 V.
2. A resistor carries 1 A and has resistance 50 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 1 × 50 = 50 V.
3. A resistor carries 1 A and has resistance 21 Ω. Use V = IR to find the voltage.
21 V
V = I × R = 1 × 21 = 21 V.
4. A resistor carries 2 A and has resistance 41 Ω. Use V = IR to find the voltage.
82 V
V = I × R = 2 × 41 = 82 V.
5. A resistor carries 4 A and has resistance 43 Ω. Use V = IR to find the voltage.
172 V
V = I × R = 4 × 43 = 172 V.
6. A resistor carries 6 A and has resistance 5 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 6 × 5 = 30 V.
7. A resistor carries 11 A and has resistance 23 Ω. Use V = IR to find the voltage.
253 V
V = I × R = 11 × 23 = 253 V.
8. A resistor carries 1 A and has resistance 11 Ω. Use V = IR to find the voltage.
11 V
V = I × R = 1 × 11 = 11 V.
9. A resistor carries 6 A and has resistance 32 Ω. Use V = IR to find the voltage.
192 V
V = I × R = 6 × 32 = 192 V.
10. A resistor carries 12 A and has resistance 27 Ω. Use V = IR to find the voltage.
324 V
V = I × R = 12 × 27 = 324 V.
11. A resistor carries 4 A and has resistance 50 Ω. Use V = IR to find the voltage.
200 V
V = I × R = 4 × 50 = 200 V.
12. A resistor carries 9 A and has resistance 46 Ω. Use V = IR to find the voltage.
414 V
V = I × R = 9 × 46 = 414 V.

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

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 8 A and has resistance 8 Ω. Use V = IR to find the voltage.
I = 8 A · R = 8 Ω
2. A resistor carries 1 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 1 A · R = 50 Ω
3. A resistor carries 1 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 1 A · R = 21 Ω
4. A resistor carries 2 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 2 A · R = 41 Ω
5. A resistor carries 4 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 4 A · R = 43 Ω
6. A resistor carries 6 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 6 A · R = 5 Ω
7. A resistor carries 11 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 11 A · R = 23 Ω
8. A resistor carries 1 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 1 A · R = 11 Ω
9. A resistor carries 6 A and has resistance 32 Ω. Use V = IR to find the voltage.
I = 6 A · R = 32 Ω
10. A resistor carries 12 A and has resistance 27 Ω. Use V = IR to find the voltage.
I = 12 A · R = 27 Ω
11. A resistor carries 4 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 4 A · R = 50 Ω
12. A resistor carries 9 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 9 A · R = 46 Ω

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

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 8 A and has resistance 8 Ω. Use V = IR to find the voltage.
64 V
V = I × R = 8 × 8 = 64 V.
2. A resistor carries 1 A and has resistance 50 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 1 × 50 = 50 V.
3. A resistor carries 1 A and has resistance 21 Ω. Use V = IR to find the voltage.
21 V
V = I × R = 1 × 21 = 21 V.
4. A resistor carries 2 A and has resistance 41 Ω. Use V = IR to find the voltage.
82 V
V = I × R = 2 × 41 = 82 V.
5. A resistor carries 4 A and has resistance 43 Ω. Use V = IR to find the voltage.
172 V
V = I × R = 4 × 43 = 172 V.
6. A resistor carries 6 A and has resistance 5 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 6 × 5 = 30 V.
7. A resistor carries 11 A and has resistance 23 Ω. Use V = IR to find the voltage.
253 V
V = I × R = 11 × 23 = 253 V.
8. A resistor carries 1 A and has resistance 11 Ω. Use V = IR to find the voltage.
11 V
V = I × R = 1 × 11 = 11 V.
9. A resistor carries 6 A and has resistance 32 Ω. Use V = IR to find the voltage.
192 V
V = I × R = 6 × 32 = 192 V.
10. A resistor carries 12 A and has resistance 27 Ω. Use V = IR to find the voltage.
324 V
V = I × R = 12 × 27 = 324 V.
11. A resistor carries 4 A and has resistance 50 Ω. Use V = IR to find the voltage.
200 V
V = I × R = 4 × 50 = 200 V.
12. A resistor carries 9 A and has resistance 46 Ω. Use V = IR to find the voltage.
414 V
V = I × R = 9 × 46 = 414 V.

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