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 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
2. A resistor carries 12 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 12 A · R = 25 Ω
3. A resistor carries 10 A and has resistance 4 Ω. Use V = IR to find the voltage.
I = 10 A · R = 4 Ω
4. A resistor carries 9 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 9 A · R = 36 Ω
5. A resistor carries 11 A and has resistance 44 Ω. Use V = IR to find the voltage.
I = 11 A · R = 44 Ω
6. A resistor carries 3 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 3 A · R = 37 Ω
7. A resistor carries 9 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 9 A · R = 3 Ω
8. A resistor carries 7 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 7 A · R = 30 Ω
9. A resistor carries 2 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 2 A · R = 9 Ω
10. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 6 A · R = 3 Ω
11. A resistor carries 8 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 8 A · R = 13 Ω
12. A resistor carries 2 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 2 A · R = 10 Ω

12 questions · Seed 50 · 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 47 Ω. Use V = IR to find the voltage.
423 V
V = I × R = 9 × 47 = 423 V.
2. A resistor carries 12 A and has resistance 25 Ω. Use V = IR to find the voltage.
300 V
V = I × R = 12 × 25 = 300 V.
3. A resistor carries 10 A and has resistance 4 Ω. Use V = IR to find the voltage.
40 V
V = I × R = 10 × 4 = 40 V.
4. A resistor carries 9 A and has resistance 36 Ω. Use V = IR to find the voltage.
324 V
V = I × R = 9 × 36 = 324 V.
5. A resistor carries 11 A and has resistance 44 Ω. Use V = IR to find the voltage.
484 V
V = I × R = 11 × 44 = 484 V.
6. A resistor carries 3 A and has resistance 37 Ω. Use V = IR to find the voltage.
111 V
V = I × R = 3 × 37 = 111 V.
7. A resistor carries 9 A and has resistance 3 Ω. Use V = IR to find the voltage.
27 V
V = I × R = 9 × 3 = 27 V.
8. A resistor carries 7 A and has resistance 30 Ω. Use V = IR to find the voltage.
210 V
V = I × R = 7 × 30 = 210 V.
9. A resistor carries 2 A and has resistance 9 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 2 × 9 = 18 V.
10. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 6 × 3 = 18 V.
11. A resistor carries 8 A and has resistance 13 Ω. Use V = IR to find the voltage.
104 V
V = I × R = 8 × 13 = 104 V.
12. A resistor carries 2 A and has resistance 10 Ω. Use V = IR to find the voltage.
20 V
V = I × R = 2 × 10 = 20 V.

12 questions · Seed 50 · 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 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
2. A resistor carries 12 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 12 A · R = 25 Ω
3. A resistor carries 10 A and has resistance 4 Ω. Use V = IR to find the voltage.
I = 10 A · R = 4 Ω
4. A resistor carries 9 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 9 A · R = 36 Ω
5. A resistor carries 11 A and has resistance 44 Ω. Use V = IR to find the voltage.
I = 11 A · R = 44 Ω
6. A resistor carries 3 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 3 A · R = 37 Ω
7. A resistor carries 9 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 9 A · R = 3 Ω
8. A resistor carries 7 A and has resistance 30 Ω. Use V = IR to find the voltage.
I = 7 A · R = 30 Ω
9. A resistor carries 2 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 2 A · R = 9 Ω
10. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 6 A · R = 3 Ω
11. A resistor carries 8 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 8 A · R = 13 Ω
12. A resistor carries 2 A and has resistance 10 Ω. Use V = IR to find the voltage.
I = 2 A · R = 10 Ω

12 questions · Seed 50 · 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 47 Ω. Use V = IR to find the voltage.
423 V
V = I × R = 9 × 47 = 423 V.
2. A resistor carries 12 A and has resistance 25 Ω. Use V = IR to find the voltage.
300 V
V = I × R = 12 × 25 = 300 V.
3. A resistor carries 10 A and has resistance 4 Ω. Use V = IR to find the voltage.
40 V
V = I × R = 10 × 4 = 40 V.
4. A resistor carries 9 A and has resistance 36 Ω. Use V = IR to find the voltage.
324 V
V = I × R = 9 × 36 = 324 V.
5. A resistor carries 11 A and has resistance 44 Ω. Use V = IR to find the voltage.
484 V
V = I × R = 11 × 44 = 484 V.
6. A resistor carries 3 A and has resistance 37 Ω. Use V = IR to find the voltage.
111 V
V = I × R = 3 × 37 = 111 V.
7. A resistor carries 9 A and has resistance 3 Ω. Use V = IR to find the voltage.
27 V
V = I × R = 9 × 3 = 27 V.
8. A resistor carries 7 A and has resistance 30 Ω. Use V = IR to find the voltage.
210 V
V = I × R = 7 × 30 = 210 V.
9. A resistor carries 2 A and has resistance 9 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 2 × 9 = 18 V.
10. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 6 × 3 = 18 V.
11. A resistor carries 8 A and has resistance 13 Ω. Use V = IR to find the voltage.
104 V
V = I × R = 8 × 13 = 104 V.
12. A resistor carries 2 A and has resistance 10 Ω. Use V = IR to find the voltage.
20 V
V = I × R = 2 × 10 = 20 V.

12 questions · Seed 50 · Age guidance, not curriculum certification