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.

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 10 A and has resistance 12 Ω. Use V = IR to find the voltage.
I = 10 A · R = 12 Ω
2. A resistor carries 7 A and has resistance 8 Ω. Use V = IR to find the voltage.
I = 7 A · R = 8 Ω
3. A resistor carries 11 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 11 A · R = 35 Ω
4. A resistor carries 6 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 6 A · R = 15 Ω
5. A resistor carries 11 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 11 A · R = 20 Ω
6. A resistor carries 4 A and has resistance 42 Ω. Use V = IR to find the voltage.
I = 4 A · R = 42 Ω
7. A resistor carries 3 A and has resistance 24 Ω. Use V = IR to find the voltage.
I = 3 A · R = 24 Ω
8. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 6 A · R = 3 Ω
9. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 1 A · R = 29 Ω
10. A resistor carries 6 A and has resistance 14 Ω. Use V = IR to find the voltage.
I = 6 A · R = 14 Ω
11. A resistor carries 10 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 10 A · R = 50 Ω
12. A resistor carries 11 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 11 A · R = 18 Ω

12 questions · Seed 52 · 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 10 A and has resistance 12 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 10 × 12 = 120 V.
2. A resistor carries 7 A and has resistance 8 Ω. Use V = IR to find the voltage.
56 V
V = I × R = 7 × 8 = 56 V.
3. A resistor carries 11 A and has resistance 35 Ω. Use V = IR to find the voltage.
385 V
V = I × R = 11 × 35 = 385 V.
4. A resistor carries 6 A and has resistance 15 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 6 × 15 = 90 V.
5. A resistor carries 11 A and has resistance 20 Ω. Use V = IR to find the voltage.
220 V
V = I × R = 11 × 20 = 220 V.
6. A resistor carries 4 A and has resistance 42 Ω. Use V = IR to find the voltage.
168 V
V = I × R = 4 × 42 = 168 V.
7. A resistor carries 3 A and has resistance 24 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 3 × 24 = 72 V.
8. 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.
9. 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.
10. A resistor carries 6 A and has resistance 14 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 6 × 14 = 84 V.
11. A resistor carries 10 A and has resistance 50 Ω. Use V = IR to find the voltage.
500 V
V = I × R = 10 × 50 = 500 V.
12. A resistor carries 11 A and has resistance 18 Ω. Use V = IR to find the voltage.
198 V
V = I × R = 11 × 18 = 198 V.

12 questions · Seed 52 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 10 A and has resistance 12 Ω. Use V = IR to find the voltage.
I = 10 A · R = 12 Ω
2. A resistor carries 7 A and has resistance 8 Ω. Use V = IR to find the voltage.
I = 7 A · R = 8 Ω
3. A resistor carries 11 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 11 A · R = 35 Ω
4. A resistor carries 6 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 6 A · R = 15 Ω
5. A resistor carries 11 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 11 A · R = 20 Ω
6. A resistor carries 4 A and has resistance 42 Ω. Use V = IR to find the voltage.
I = 4 A · R = 42 Ω
7. A resistor carries 3 A and has resistance 24 Ω. Use V = IR to find the voltage.
I = 3 A · R = 24 Ω
8. A resistor carries 6 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 6 A · R = 3 Ω
9. A resistor carries 1 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 1 A · R = 29 Ω
10. A resistor carries 6 A and has resistance 14 Ω. Use V = IR to find the voltage.
I = 6 A · R = 14 Ω
11. A resistor carries 10 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 10 A · R = 50 Ω
12. A resistor carries 11 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 11 A · R = 18 Ω

12 questions · Seed 52 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 10 A and has resistance 12 Ω. Use V = IR to find the voltage.
120 V
V = I × R = 10 × 12 = 120 V.
2. A resistor carries 7 A and has resistance 8 Ω. Use V = IR to find the voltage.
56 V
V = I × R = 7 × 8 = 56 V.
3. A resistor carries 11 A and has resistance 35 Ω. Use V = IR to find the voltage.
385 V
V = I × R = 11 × 35 = 385 V.
4. A resistor carries 6 A and has resistance 15 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 6 × 15 = 90 V.
5. A resistor carries 11 A and has resistance 20 Ω. Use V = IR to find the voltage.
220 V
V = I × R = 11 × 20 = 220 V.
6. A resistor carries 4 A and has resistance 42 Ω. Use V = IR to find the voltage.
168 V
V = I × R = 4 × 42 = 168 V.
7. A resistor carries 3 A and has resistance 24 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 3 × 24 = 72 V.
8. 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.
9. 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.
10. A resistor carries 6 A and has resistance 14 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 6 × 14 = 84 V.
11. A resistor carries 10 A and has resistance 50 Ω. Use V = IR to find the voltage.
500 V
V = I × R = 10 × 50 = 500 V.
12. A resistor carries 11 A and has resistance 18 Ω. Use V = IR to find the voltage.
198 V
V = I × R = 11 × 18 = 198 V.

12 questions · Seed 52 · Age guidance, not curriculum certification