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 1 A and has resistance 48 Ω. Use V = IR to find the voltage.
I = 1 A · R = 48 Ω
2. A resistor carries 7 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 7 A · R = 25 Ω
3. A resistor carries 10 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 10 A · R = 37 Ω
4. A resistor carries 4 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 4 A · R = 35 Ω
5. A resistor carries 3 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 3 A · R = 50 Ω
6. A resistor carries 3 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 3 A · R = 31 Ω
7. A resistor carries 2 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 2 A · R = 49 Ω
8. A resistor carries 7 A and has resistance 34 Ω. Use V = IR to find the voltage.
I = 7 A · R = 34 Ω
9. A resistor carries 11 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 11 A · R = 2 Ω
10. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 8 A · R = 43 Ω
11. A resistor carries 5 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 5 A · R = 36 Ω
12. A resistor carries 4 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 4 A · R = 41 Ω

12 questions · Seed 49 · 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 1 A and has resistance 48 Ω. Use V = IR to find the voltage.
48 V
V = I × R = 1 × 48 = 48 V.
2. A resistor carries 7 A and has resistance 25 Ω. Use V = IR to find the voltage.
175 V
V = I × R = 7 × 25 = 175 V.
3. A resistor carries 10 A and has resistance 37 Ω. Use V = IR to find the voltage.
370 V
V = I × R = 10 × 37 = 370 V.
4. A resistor carries 4 A and has resistance 35 Ω. Use V = IR to find the voltage.
140 V
V = I × R = 4 × 35 = 140 V.
5. A resistor carries 3 A and has resistance 50 Ω. Use V = IR to find the voltage.
150 V
V = I × R = 3 × 50 = 150 V.
6. A resistor carries 3 A and has resistance 31 Ω. Use V = IR to find the voltage.
93 V
V = I × R = 3 × 31 = 93 V.
7. A resistor carries 2 A and has resistance 49 Ω. Use V = IR to find the voltage.
98 V
V = I × R = 2 × 49 = 98 V.
8. A resistor carries 7 A and has resistance 34 Ω. Use V = IR to find the voltage.
238 V
V = I × R = 7 × 34 = 238 V.
9. A resistor carries 11 A and has resistance 2 Ω. Use V = IR to find the voltage.
22 V
V = I × R = 11 × 2 = 22 V.
10. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
344 V
V = I × R = 8 × 43 = 344 V.
11. A resistor carries 5 A and has resistance 36 Ω. Use V = IR to find the voltage.
180 V
V = I × R = 5 × 36 = 180 V.
12. A resistor carries 4 A and has resistance 41 Ω. Use V = IR to find the voltage.
164 V
V = I × R = 4 × 41 = 164 V.

12 questions · Seed 49 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 1 A and has resistance 48 Ω. Use V = IR to find the voltage.
I = 1 A · R = 48 Ω
2. A resistor carries 7 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 7 A · R = 25 Ω
3. A resistor carries 10 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 10 A · R = 37 Ω
4. A resistor carries 4 A and has resistance 35 Ω. Use V = IR to find the voltage.
I = 4 A · R = 35 Ω
5. A resistor carries 3 A and has resistance 50 Ω. Use V = IR to find the voltage.
I = 3 A · R = 50 Ω
6. A resistor carries 3 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 3 A · R = 31 Ω
7. A resistor carries 2 A and has resistance 49 Ω. Use V = IR to find the voltage.
I = 2 A · R = 49 Ω
8. A resistor carries 7 A and has resistance 34 Ω. Use V = IR to find the voltage.
I = 7 A · R = 34 Ω
9. A resistor carries 11 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 11 A · R = 2 Ω
10. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 8 A · R = 43 Ω
11. A resistor carries 5 A and has resistance 36 Ω. Use V = IR to find the voltage.
I = 5 A · R = 36 Ω
12. A resistor carries 4 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 4 A · R = 41 Ω

12 questions · Seed 49 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 1 A and has resistance 48 Ω. Use V = IR to find the voltage.
48 V
V = I × R = 1 × 48 = 48 V.
2. A resistor carries 7 A and has resistance 25 Ω. Use V = IR to find the voltage.
175 V
V = I × R = 7 × 25 = 175 V.
3. A resistor carries 10 A and has resistance 37 Ω. Use V = IR to find the voltage.
370 V
V = I × R = 10 × 37 = 370 V.
4. A resistor carries 4 A and has resistance 35 Ω. Use V = IR to find the voltage.
140 V
V = I × R = 4 × 35 = 140 V.
5. A resistor carries 3 A and has resistance 50 Ω. Use V = IR to find the voltage.
150 V
V = I × R = 3 × 50 = 150 V.
6. A resistor carries 3 A and has resistance 31 Ω. Use V = IR to find the voltage.
93 V
V = I × R = 3 × 31 = 93 V.
7. A resistor carries 2 A and has resistance 49 Ω. Use V = IR to find the voltage.
98 V
V = I × R = 2 × 49 = 98 V.
8. A resistor carries 7 A and has resistance 34 Ω. Use V = IR to find the voltage.
238 V
V = I × R = 7 × 34 = 238 V.
9. A resistor carries 11 A and has resistance 2 Ω. Use V = IR to find the voltage.
22 V
V = I × R = 11 × 2 = 22 V.
10. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
344 V
V = I × R = 8 × 43 = 344 V.
11. A resistor carries 5 A and has resistance 36 Ω. Use V = IR to find the voltage.
180 V
V = I × R = 5 × 36 = 180 V.
12. A resistor carries 4 A and has resistance 41 Ω. Use V = IR to find the voltage.
164 V
V = I × R = 4 × 41 = 164 V.

12 questions · Seed 49 · Age guidance, not curriculum certification