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 9 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 9 A · R = 49 Ω
2. A resistor carries 8 A and has resistance 22 Ω. Use V = IR to find the voltage.
I = 8 A · R = 22 Ω
3. A resistor carries 5 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 5 A · R = 37 Ω
4. A resistor carries 2 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 2 A · R = 21 Ω
5. A resistor carries 11 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 11 A · R = 5 Ω
6. A resistor carries 11 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 11 A · R = 21 Ω
7. A resistor carries 5 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 5 A · R = 43 Ω
8. A resistor carries 8 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 8 A · R = 41 Ω
9. A resistor carries 1 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 1 A · R = 10 Ω
10. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 1 A · R = 31 Ω
11. A resistor carries 4 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 4 A · R = 39 Ω
12. A resistor carries 5 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 5 A · R = 41 Ω

12 questions · Seed 104739 · 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 9 A and has resistance 49 Ω. Use V = IR to find the voltage.
441 V
V = I × R = 9 × 49 = 441 V.
2. A resistor carries 8 A and has resistance 22 Ω. Use V = IR to find the voltage.
176 V
V = I × R = 8 × 22 = 176 V.
3. A resistor carries 5 A and has resistance 37 Ω. Use V = IR to find the voltage.
185 V
V = I × R = 5 × 37 = 185 V.
4. A resistor carries 2 A and has resistance 21 Ω. Use V = IR to find the voltage.
42 V
V = I × R = 2 × 21 = 42 V.
5. A resistor carries 11 A and has resistance 5 Ω. Use V = IR to find the voltage.
55 V
V = I × R = 11 × 5 = 55 V.
6. A resistor carries 11 A and has resistance 21 Ω. Use V = IR to find the voltage.
231 V
V = I × R = 11 × 21 = 231 V.
7. A resistor carries 5 A and has resistance 43 Ω. Use V = IR to find the voltage.
215 V
V = I × R = 5 × 43 = 215 V.
8. A resistor carries 8 A and has resistance 41 Ω. Use V = IR to find the voltage.
328 V
V = I × R = 8 × 41 = 328 V.
9. A resistor carries 1 A and has resistance 10 Ω. Use V = IR to find the voltage.
10 V
V = I × R = 1 × 10 = 10 V.
10. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
31 V
V = I × R = 1 × 31 = 31 V.
11. A resistor carries 4 A and has resistance 39 Ω. Use V = IR to find the voltage.
156 V
V = I × R = 4 × 39 = 156 V.
12. A resistor carries 5 A and has resistance 41 Ω. Use V = IR to find the voltage.
205 V
V = I × R = 5 × 41 = 205 V.

12 questions · Seed 104739 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 9 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 9 A · R = 49 Ω
2. A resistor carries 8 A and has resistance 22 Ω. Use V = IR to find the voltage.
I = 8 A · R = 22 Ω
3. A resistor carries 5 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 5 A · R = 37 Ω
4. A resistor carries 2 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 2 A · R = 21 Ω
5. A resistor carries 11 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 11 A · R = 5 Ω
6. A resistor carries 11 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 11 A · R = 21 Ω
7. A resistor carries 5 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 5 A · R = 43 Ω
8. A resistor carries 8 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 8 A · R = 41 Ω
9. A resistor carries 1 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 1 A · R = 10 Ω
10. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 1 A · R = 31 Ω
11. A resistor carries 4 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 4 A · R = 39 Ω
12. A resistor carries 5 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 5 A · R = 41 Ω

12 questions · Seed 104739 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 9 A and has resistance 49 Ω. Use V = IR to find the voltage.
441 V
V = I × R = 9 × 49 = 441 V.
2. A resistor carries 8 A and has resistance 22 Ω. Use V = IR to find the voltage.
176 V
V = I × R = 8 × 22 = 176 V.
3. A resistor carries 5 A and has resistance 37 Ω. Use V = IR to find the voltage.
185 V
V = I × R = 5 × 37 = 185 V.
4. A resistor carries 2 A and has resistance 21 Ω. Use V = IR to find the voltage.
42 V
V = I × R = 2 × 21 = 42 V.
5. A resistor carries 11 A and has resistance 5 Ω. Use V = IR to find the voltage.
55 V
V = I × R = 11 × 5 = 55 V.
6. A resistor carries 11 A and has resistance 21 Ω. Use V = IR to find the voltage.
231 V
V = I × R = 11 × 21 = 231 V.
7. A resistor carries 5 A and has resistance 43 Ω. Use V = IR to find the voltage.
215 V
V = I × R = 5 × 43 = 215 V.
8. A resistor carries 8 A and has resistance 41 Ω. Use V = IR to find the voltage.
328 V
V = I × R = 8 × 41 = 328 V.
9. A resistor carries 1 A and has resistance 10 Ω. Use V = IR to find the voltage.
10 V
V = I × R = 1 × 10 = 10 V.
10. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
31 V
V = I × R = 1 × 31 = 31 V.
11. A resistor carries 4 A and has resistance 39 Ω. Use V = IR to find the voltage.
156 V
V = I × R = 4 × 39 = 156 V.
12. A resistor carries 5 A and has resistance 41 Ω. Use V = IR to find the voltage.
205 V
V = I × R = 5 × 41 = 205 V.

12 questions · Seed 104739 · Age guidance, not curriculum certification