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 49 Ω. Use V = IR to find the voltage.
I = 8 A · R = 49 Ω
2. A resistor carries 7 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 7 A · R = 37 Ω
3. A resistor carries 2 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 2 A · R = 6 Ω
4. A resistor carries 5 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 5 A · R = 49 Ω
5. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
6. A resistor carries 12 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 12 A · R = 46 Ω
7. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 10 A · R = 41 Ω
8. A resistor carries 1 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 1 A · R = 6 Ω
9. A resistor carries 3 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 3 A · R = 30 Ω
10. A resistor carries 9 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 9 A · R = 23 Ω
11. A resistor carries 4 A and has resistance 7 Ω. Use V = IR to find the voltage.
I = 4 A · R = 7 Ω
12. A resistor carries 10 A and has resistance 32 Ω. Use V = IR to find the voltage.
I = 10 A · R = 32 Ω

12 questions · Seed 104729 · 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 49 Ω. Use V = IR to find the voltage.
392 V
V = I × R = 8 × 49 = 392 V.
2. A resistor carries 7 A and has resistance 37 Ω. Use V = IR to find the voltage.
259 V
V = I × R = 7 × 37 = 259 V.
3. A resistor carries 2 A and has resistance 6 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 2 × 6 = 12 V.
4. A resistor carries 5 A and has resistance 49 Ω. Use V = IR to find the voltage.
245 V
V = I × R = 5 × 49 = 245 V.
5. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
423 V
V = I × R = 9 × 47 = 423 V.
6. A resistor carries 12 A and has resistance 46 Ω. Use V = IR to find the voltage.
552 V
V = I × R = 12 × 46 = 552 V.
7. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
410 V
V = I × R = 10 × 41 = 410 V.
8. A resistor carries 1 A and has resistance 6 Ω. Use V = IR to find the voltage.
6 V
V = I × R = 1 × 6 = 6 V.
9. A resistor carries 3 A and has resistance 30 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 3 × 30 = 90 V.
10. A resistor carries 9 A and has resistance 23 Ω. Use V = IR to find the voltage.
207 V
V = I × R = 9 × 23 = 207 V.
11. A resistor carries 4 A and has resistance 7 Ω. Use V = IR to find the voltage.
28 V
V = I × R = 4 × 7 = 28 V.
12. A resistor carries 10 A and has resistance 32 Ω. Use V = IR to find the voltage.
320 V
V = I × R = 10 × 32 = 320 V.

12 questions · Seed 104729 · 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 49 Ω. Use V = IR to find the voltage.
I = 8 A · R = 49 Ω
2. A resistor carries 7 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 7 A · R = 37 Ω
3. A resistor carries 2 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 2 A · R = 6 Ω
4. A resistor carries 5 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 5 A · R = 49 Ω
5. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
6. A resistor carries 12 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 12 A · R = 46 Ω
7. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 10 A · R = 41 Ω
8. A resistor carries 1 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 1 A · R = 6 Ω
9. A resistor carries 3 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 3 A · R = 30 Ω
10. A resistor carries 9 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 9 A · R = 23 Ω
11. A resistor carries 4 A and has resistance 7 Ω. Use V = IR to find the voltage.
I = 4 A · R = 7 Ω
12. A resistor carries 10 A and has resistance 32 Ω. Use V = IR to find the voltage.
I = 10 A · R = 32 Ω

12 questions · Seed 104729 · 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 49 Ω. Use V = IR to find the voltage.
392 V
V = I × R = 8 × 49 = 392 V.
2. A resistor carries 7 A and has resistance 37 Ω. Use V = IR to find the voltage.
259 V
V = I × R = 7 × 37 = 259 V.
3. A resistor carries 2 A and has resistance 6 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 2 × 6 = 12 V.
4. A resistor carries 5 A and has resistance 49 Ω. Use V = IR to find the voltage.
245 V
V = I × R = 5 × 49 = 245 V.
5. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
423 V
V = I × R = 9 × 47 = 423 V.
6. A resistor carries 12 A and has resistance 46 Ω. Use V = IR to find the voltage.
552 V
V = I × R = 12 × 46 = 552 V.
7. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
410 V
V = I × R = 10 × 41 = 410 V.
8. A resistor carries 1 A and has resistance 6 Ω. Use V = IR to find the voltage.
6 V
V = I × R = 1 × 6 = 6 V.
9. A resistor carries 3 A and has resistance 30 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 3 × 30 = 90 V.
10. A resistor carries 9 A and has resistance 23 Ω. Use V = IR to find the voltage.
207 V
V = I × R = 9 × 23 = 207 V.
11. A resistor carries 4 A and has resistance 7 Ω. Use V = IR to find the voltage.
28 V
V = I × R = 4 × 7 = 28 V.
12. A resistor carries 10 A and has resistance 32 Ω. Use V = IR to find the voltage.
320 V
V = I × R = 10 × 32 = 320 V.

12 questions · Seed 104729 · Age guidance, not curriculum certification