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 2 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 2 A · R = 40 Ω
2. A resistor carries 1 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 1 A · R = 46 Ω
3. A resistor carries 3 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 3 A · R = 3 Ω
4. A resistor carries 4 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 4 A · R = 15 Ω
5. A resistor carries 9 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 9 A · R = 13 Ω
6. A resistor carries 7 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 7 A · R = 47 Ω
7. A resistor carries 9 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 9 A · R = 19 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 6 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 6 A · R = 29 Ω
10. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
11. A resistor carries 5 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 5 A · R = 25 Ω
12. A resistor carries 12 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 12 A · R = 36 Ω

12 questions · Seed 57 · 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 2 A and has resistance 40 Ω. Use V = IR to find the voltage.
80 V
V = I × R = 2 × 40 = 80 V.
2. A resistor carries 1 A and has resistance 46 Ω. Use V = IR to find the voltage.
46 V
V = I × R = 1 × 46 = 46 V.
3. A resistor carries 3 A and has resistance 3 Ω. Use V = IR to find the voltage.
9 V
V = I × R = 3 × 3 = 9 V.
4. A resistor carries 4 A and has resistance 15 Ω. Use V = IR to find the voltage.
60 V
V = I × R = 4 × 15 = 60 V.
5. A resistor carries 9 A and has resistance 13 Ω. Use V = IR to find the voltage.
117 V
V = I × R = 9 × 13 = 117 V.
6. A resistor carries 7 A and has resistance 47 Ω. Use V = IR to find the voltage.
329 V
V = I × R = 7 × 47 = 329 V.
7. A resistor carries 9 A and has resistance 19 Ω. Use V = IR to find the voltage.
171 V
V = I × R = 9 × 19 = 171 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 6 A and has resistance 29 Ω. Use V = IR to find the voltage.
174 V
V = I × R = 6 × 29 = 174 V.
10. 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.
11. A resistor carries 5 A and has resistance 25 Ω. Use V = IR to find the voltage.
125 V
V = I × R = 5 × 25 = 125 V.
12. A resistor carries 12 A and has resistance 36 Ω. Use V = IR to find the voltage.
432 V
V = I × R = 12 × 36 = 432 V.

12 questions · Seed 57 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 2 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 2 A · R = 40 Ω
2. A resistor carries 1 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 1 A · R = 46 Ω
3. A resistor carries 3 A and has resistance 3 Ω. Use V = IR to find the voltage.
I = 3 A · R = 3 Ω
4. A resistor carries 4 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 4 A · R = 15 Ω
5. A resistor carries 9 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 9 A · R = 13 Ω
6. A resistor carries 7 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 7 A · R = 47 Ω
7. A resistor carries 9 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 9 A · R = 19 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 6 A and has resistance 29 Ω. Use V = IR to find the voltage.
I = 6 A · R = 29 Ω
10. A resistor carries 9 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 9 A · R = 47 Ω
11. A resistor carries 5 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 5 A · R = 25 Ω
12. A resistor carries 12 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 12 A · R = 36 Ω

12 questions · Seed 57 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 2 A and has resistance 40 Ω. Use V = IR to find the voltage.
80 V
V = I × R = 2 × 40 = 80 V.
2. A resistor carries 1 A and has resistance 46 Ω. Use V = IR to find the voltage.
46 V
V = I × R = 1 × 46 = 46 V.
3. A resistor carries 3 A and has resistance 3 Ω. Use V = IR to find the voltage.
9 V
V = I × R = 3 × 3 = 9 V.
4. A resistor carries 4 A and has resistance 15 Ω. Use V = IR to find the voltage.
60 V
V = I × R = 4 × 15 = 60 V.
5. A resistor carries 9 A and has resistance 13 Ω. Use V = IR to find the voltage.
117 V
V = I × R = 9 × 13 = 117 V.
6. A resistor carries 7 A and has resistance 47 Ω. Use V = IR to find the voltage.
329 V
V = I × R = 7 × 47 = 329 V.
7. A resistor carries 9 A and has resistance 19 Ω. Use V = IR to find the voltage.
171 V
V = I × R = 9 × 19 = 171 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 6 A and has resistance 29 Ω. Use V = IR to find the voltage.
174 V
V = I × R = 6 × 29 = 174 V.
10. 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.
11. A resistor carries 5 A and has resistance 25 Ω. Use V = IR to find the voltage.
125 V
V = I × R = 5 × 25 = 125 V.
12. A resistor carries 12 A and has resistance 36 Ω. Use V = IR to find the voltage.
432 V
V = I × R = 12 × 36 = 432 V.

12 questions · Seed 57 · Age guidance, not curriculum certification