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 16 Ω. Use V = IR to find the voltage.
I = 9 A · R = 16 Ω
2. A resistor carries 3 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 3 A · R = 21 Ω
3. A resistor carries 5 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 5 A · R = 11 Ω
4. A resistor carries 1 A and has resistance 27 Ω. Use V = IR to find the voltage.
I = 1 A · R = 27 Ω
5. A resistor carries 6 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 6 A · R = 21 Ω
6. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 6 A · R = 2 Ω
7. A resistor carries 7 A and has resistance 45 Ω. Use V = IR to find the voltage.
I = 7 A · R = 45 Ω
8. A resistor carries 10 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 10 A · R = 29 Ω
9. A resistor carries 4 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 4 A · R = 37 Ω
10. A resistor carries 10 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 10 A · R = 21 Ω
11. A resistor carries 3 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 3 A · R = 43 Ω
12. A resistor carries 4 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 4 A · R = 18 Ω

12 questions · Seed 45 · 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 16 Ω. Use V = IR to find the voltage.
144 V
V = I × R = 9 × 16 = 144 V.
2. A resistor carries 3 A and has resistance 21 Ω. Use V = IR to find the voltage.
63 V
V = I × R = 3 × 21 = 63 V.
3. A resistor carries 5 A and has resistance 11 Ω. Use V = IR to find the voltage.
55 V
V = I × R = 5 × 11 = 55 V.
4. A resistor carries 1 A and has resistance 27 Ω. Use V = IR to find the voltage.
27 V
V = I × R = 1 × 27 = 27 V.
5. A resistor carries 6 A and has resistance 21 Ω. Use V = IR to find the voltage.
126 V
V = I × R = 6 × 21 = 126 V.
6. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 6 × 2 = 12 V.
7. A resistor carries 7 A and has resistance 45 Ω. Use V = IR to find the voltage.
315 V
V = I × R = 7 × 45 = 315 V.
8. A resistor carries 10 A and has resistance 29 Ω. Use V = IR to find the voltage.
290 V
V = I × R = 10 × 29 = 290 V.
9. A resistor carries 4 A and has resistance 37 Ω. Use V = IR to find the voltage.
148 V
V = I × R = 4 × 37 = 148 V.
10. A resistor carries 10 A and has resistance 21 Ω. Use V = IR to find the voltage.
210 V
V = I × R = 10 × 21 = 210 V.
11. A resistor carries 3 A and has resistance 43 Ω. Use V = IR to find the voltage.
129 V
V = I × R = 3 × 43 = 129 V.
12. A resistor carries 4 A and has resistance 18 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 4 × 18 = 72 V.

12 questions · Seed 45 · 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 16 Ω. Use V = IR to find the voltage.
I = 9 A · R = 16 Ω
2. A resistor carries 3 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 3 A · R = 21 Ω
3. A resistor carries 5 A and has resistance 11 Ω. Use V = IR to find the voltage.
I = 5 A · R = 11 Ω
4. A resistor carries 1 A and has resistance 27 Ω. Use V = IR to find the voltage.
I = 1 A · R = 27 Ω
5. A resistor carries 6 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 6 A · R = 21 Ω
6. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 6 A · R = 2 Ω
7. A resistor carries 7 A and has resistance 45 Ω. Use V = IR to find the voltage.
I = 7 A · R = 45 Ω
8. A resistor carries 10 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 10 A · R = 29 Ω
9. A resistor carries 4 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 4 A · R = 37 Ω
10. A resistor carries 10 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 10 A · R = 21 Ω
11. A resistor carries 3 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 3 A · R = 43 Ω
12. A resistor carries 4 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 4 A · R = 18 Ω

12 questions · Seed 45 · 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 16 Ω. Use V = IR to find the voltage.
144 V
V = I × R = 9 × 16 = 144 V.
2. A resistor carries 3 A and has resistance 21 Ω. Use V = IR to find the voltage.
63 V
V = I × R = 3 × 21 = 63 V.
3. A resistor carries 5 A and has resistance 11 Ω. Use V = IR to find the voltage.
55 V
V = I × R = 5 × 11 = 55 V.
4. A resistor carries 1 A and has resistance 27 Ω. Use V = IR to find the voltage.
27 V
V = I × R = 1 × 27 = 27 V.
5. A resistor carries 6 A and has resistance 21 Ω. Use V = IR to find the voltage.
126 V
V = I × R = 6 × 21 = 126 V.
6. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 6 × 2 = 12 V.
7. A resistor carries 7 A and has resistance 45 Ω. Use V = IR to find the voltage.
315 V
V = I × R = 7 × 45 = 315 V.
8. A resistor carries 10 A and has resistance 29 Ω. Use V = IR to find the voltage.
290 V
V = I × R = 10 × 29 = 290 V.
9. A resistor carries 4 A and has resistance 37 Ω. Use V = IR to find the voltage.
148 V
V = I × R = 4 × 37 = 148 V.
10. A resistor carries 10 A and has resistance 21 Ω. Use V = IR to find the voltage.
210 V
V = I × R = 10 × 21 = 210 V.
11. A resistor carries 3 A and has resistance 43 Ω. Use V = IR to find the voltage.
129 V
V = I × R = 3 × 43 = 129 V.
12. A resistor carries 4 A and has resistance 18 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 4 × 18 = 72 V.

12 questions · Seed 45 · Age guidance, not curriculum certification