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 42 Ω. Use V = IR to find the voltage.
I = 7 A · R = 42 Ω
2. A resistor carries 5 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 5 A · R = 10 Ω
3. A resistor carries 4 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 4 A · R = 21 Ω
4. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 1 A · R = 31 Ω
5. A resistor carries 9 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 9 A · R = 50 Ω
6. A resistor carries 4 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 4 A · R = 30 Ω
7. A resistor carries 4 A and has resistance 34 Ω. Use V = IR to find the voltage.
I = 4 A · R = 34 Ω
8. A resistor carries 1 A and has resistance 16 Ω. Use V = IR to find the voltage.
I = 1 A · R = 16 Ω
9. A resistor carries 11 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 11 A · R = 38 Ω
10. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 1 A · R = 29 Ω
11. A resistor carries 6 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 6 A · R = 41 Ω
12. A resistor carries 8 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 8 A · R = 35 Ω

12 questions · Seed 104740 · 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 42 Ω. Use V = IR to find the voltage.
294 V
V = I × R = 7 × 42 = 294 V.
2. A resistor carries 5 A and has resistance 10 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 5 × 10 = 50 V.
3. A resistor carries 4 A and has resistance 21 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 4 × 21 = 84 V.
4. 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.
5. A resistor carries 9 A and has resistance 50 Ω. Use V = IR to find the voltage.
450 V
V = I × R = 9 × 50 = 450 V.
6. A resistor carries 4 A and has resistance 30 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 4 × 30 = 120 V.
7. A resistor carries 4 A and has resistance 34 Ω. Use V = IR to find the voltage.
136 V
V = I × R = 4 × 34 = 136 V.
8. A resistor carries 1 A and has resistance 16 Ω. Use V = IR to find the voltage.
16 V
V = I × R = 1 × 16 = 16 V.
9. A resistor carries 11 A and has resistance 38 Ω. Use V = IR to find the voltage.
418 V
V = I × R = 11 × 38 = 418 V.
10. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
29 V
V = I × R = 1 × 29 = 29 V.
11. A resistor carries 6 A and has resistance 41 Ω. Use V = IR to find the voltage.
246 V
V = I × R = 6 × 41 = 246 V.
12. A resistor carries 8 A and has resistance 35 Ω. Use V = IR to find the voltage.
280 V
V = I × R = 8 × 35 = 280 V.

12 questions · Seed 104740 · 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 42 Ω. Use V = IR to find the voltage.
I = 7 A · R = 42 Ω
2. A resistor carries 5 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 5 A · R = 10 Ω
3. A resistor carries 4 A and has resistance 21 Ω. Use V = IR to find the voltage.
I = 4 A · R = 21 Ω
4. A resistor carries 1 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 1 A · R = 31 Ω
5. A resistor carries 9 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 9 A · R = 50 Ω
6. A resistor carries 4 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 4 A · R = 30 Ω
7. A resistor carries 4 A and has resistance 34 Ω. Use V = IR to find the voltage.
I = 4 A · R = 34 Ω
8. A resistor carries 1 A and has resistance 16 Ω. Use V = IR to find the voltage.
I = 1 A · R = 16 Ω
9. A resistor carries 11 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 11 A · R = 38 Ω
10. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 1 A · R = 29 Ω
11. A resistor carries 6 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 6 A · R = 41 Ω
12. A resistor carries 8 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 8 A · R = 35 Ω

12 questions · Seed 104740 · 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 42 Ω. Use V = IR to find the voltage.
294 V
V = I × R = 7 × 42 = 294 V.
2. A resistor carries 5 A and has resistance 10 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 5 × 10 = 50 V.
3. A resistor carries 4 A and has resistance 21 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 4 × 21 = 84 V.
4. 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.
5. A resistor carries 9 A and has resistance 50 Ω. Use V = IR to find the voltage.
450 V
V = I × R = 9 × 50 = 450 V.
6. A resistor carries 4 A and has resistance 30 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 4 × 30 = 120 V.
7. A resistor carries 4 A and has resistance 34 Ω. Use V = IR to find the voltage.
136 V
V = I × R = 4 × 34 = 136 V.
8. A resistor carries 1 A and has resistance 16 Ω. Use V = IR to find the voltage.
16 V
V = I × R = 1 × 16 = 16 V.
9. A resistor carries 11 A and has resistance 38 Ω. Use V = IR to find the voltage.
418 V
V = I × R = 11 × 38 = 418 V.
10. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
29 V
V = I × R = 1 × 29 = 29 V.
11. A resistor carries 6 A and has resistance 41 Ω. Use V = IR to find the voltage.
246 V
V = I × R = 6 × 41 = 246 V.
12. A resistor carries 8 A and has resistance 35 Ω. Use V = IR to find the voltage.
280 V
V = I × R = 8 × 35 = 280 V.

12 questions · Seed 104740 · Age guidance, not curriculum certification