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 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 7 A · R = 38 Ω
2. A resistor carries 10 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 10 A · R = 5 Ω
3. A resistor carries 5 A and has resistance 14 Ω. Use V = IR to find the voltage.
I = 5 A · R = 14 Ω
4. A resistor carries 10 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 10 A · R = 2 Ω
5. A resistor carries 10 A and has resistance 17 Ω. Use V = IR to find the voltage.
I = 10 A · R = 17 Ω
6. A resistor carries 3 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 3 A · R = 40 Ω
7. A resistor carries 1 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 1 A · R = 30 Ω
8. A resistor carries 11 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 11 A · R = 11 Ω
9. A resistor carries 4 A and has resistance 4 Ω. Use V = IR to find the voltage.
I = 4 A · R = 4 Ω
10. A resistor carries 7 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 7 A · R = 10 Ω
11. A resistor carries 8 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 8 A · R = 20 Ω
12. A resistor carries 11 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 11 A · R = 40 Ω

12 questions · Seed 104736 · 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 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
266 V
V = I × R = 7 × 38 = 266 V.
2. A resistor carries 10 A and has resistance 5 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 10 × 5 = 50 V.
3. A resistor carries 5 A and has resistance 14 Ω. Use V = IR to find the voltage.
70 V
V = I × R = 5 × 14 = 70 V.
4. A resistor carries 10 A and has resistance 2 Ω. Use V = IR to find the voltage.
20 V
V = I × R = 10 × 2 = 20 V.
5. A resistor carries 10 A and has resistance 17 Ω. Use V = IR to find the voltage.
170 V
V = I × R = 10 × 17 = 170 V.
6. A resistor carries 3 A and has resistance 40 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 3 × 40 = 120 V.
7. A resistor carries 1 A and has resistance 30 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 1 × 30 = 30 V.
8. A resistor carries 11 A and has resistance 11 Ω. Use V = IR to find the voltage.
121 V
V = I × R = 11 × 11 = 121 V.
9. A resistor carries 4 A and has resistance 4 Ω. Use V = IR to find the voltage.
16 V
V = I × R = 4 × 4 = 16 V.
10. A resistor carries 7 A and has resistance 10 Ω. Use V = IR to find the voltage.
70 V
V = I × R = 7 × 10 = 70 V.
11. A resistor carries 8 A and has resistance 20 Ω. Use V = IR to find the voltage.
160 V
V = I × R = 8 × 20 = 160 V.
12. A resistor carries 11 A and has resistance 40 Ω. Use V = IR to find the voltage.
440 V
V = I × R = 11 × 40 = 440 V.

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 7 A · R = 38 Ω
2. A resistor carries 10 A and has resistance 5 Ω. Use V = IR to find the voltage.
I = 10 A · R = 5 Ω
3. A resistor carries 5 A and has resistance 14 Ω. Use V = IR to find the voltage.
I = 5 A · R = 14 Ω
4. A resistor carries 10 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 10 A · R = 2 Ω
5. A resistor carries 10 A and has resistance 17 Ω. Use V = IR to find the voltage.
I = 10 A · R = 17 Ω
6. A resistor carries 3 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 3 A · R = 40 Ω
7. A resistor carries 1 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 1 A · R = 30 Ω
8. A resistor carries 11 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 11 A · R = 11 Ω
9. A resistor carries 4 A and has resistance 4 Ω. Use V = IR to find the voltage.
I = 4 A · R = 4 Ω
10. A resistor carries 7 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 7 A · R = 10 Ω
11. A resistor carries 8 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 8 A · R = 20 Ω
12. A resistor carries 11 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 11 A · R = 40 Ω

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
266 V
V = I × R = 7 × 38 = 266 V.
2. A resistor carries 10 A and has resistance 5 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 10 × 5 = 50 V.
3. A resistor carries 5 A and has resistance 14 Ω. Use V = IR to find the voltage.
70 V
V = I × R = 5 × 14 = 70 V.
4. A resistor carries 10 A and has resistance 2 Ω. Use V = IR to find the voltage.
20 V
V = I × R = 10 × 2 = 20 V.
5. A resistor carries 10 A and has resistance 17 Ω. Use V = IR to find the voltage.
170 V
V = I × R = 10 × 17 = 170 V.
6. A resistor carries 3 A and has resistance 40 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 3 × 40 = 120 V.
7. A resistor carries 1 A and has resistance 30 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 1 × 30 = 30 V.
8. A resistor carries 11 A and has resistance 11 Ω. Use V = IR to find the voltage.
121 V
V = I × R = 11 × 11 = 121 V.
9. A resistor carries 4 A and has resistance 4 Ω. Use V = IR to find the voltage.
16 V
V = I × R = 4 × 4 = 16 V.
10. A resistor carries 7 A and has resistance 10 Ω. Use V = IR to find the voltage.
70 V
V = I × R = 7 × 10 = 70 V.
11. A resistor carries 8 A and has resistance 20 Ω. Use V = IR to find the voltage.
160 V
V = I × R = 8 × 20 = 160 V.
12. A resistor carries 11 A and has resistance 40 Ω. Use V = IR to find the voltage.
440 V
V = I × R = 11 × 40 = 440 V.

12 questions · Seed 104736 · Age guidance, not curriculum certification