ScienceAges 16-18

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 16-18

Take your time. Show your thinking.

1. A resistor carries 5 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 5 A · R = 18 Ω
2. A resistor carries 8 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 8 A · R = 23 Ω
3. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 6 A · R = 2 Ω
4. A resistor carries 2 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 2 A · R = 2 Ω
5. A resistor carries 11 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 11 A · R = 46 Ω
6. A resistor carries 4 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 4 A · R = 19 Ω
7. A resistor carries 3 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 3 A · R = 38 Ω
8. A resistor carries 9 A and has resistance 33 Ω. Use V = IR to find the voltage.
I = 9 A · R = 33 Ω
9. A resistor carries 10 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 10 A · R = 39 Ω
10. A resistor carries 2 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 2 A · R = 25 Ω
11. A resistor carries 3 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 3 A · R = 39 Ω
12. A resistor carries 5 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 5 A · R = 6 Ω

12 questions · Seed 104733 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Answers and reasoning. Review before teaching.

1. A resistor carries 5 A and has resistance 18 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 5 × 18 = 90 V.
2. A resistor carries 8 A and has resistance 23 Ω. Use V = IR to find the voltage.
184 V
V = I × R = 8 × 23 = 184 V.
3. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 6 × 2 = 12 V.
4. A resistor carries 2 A and has resistance 2 Ω. Use V = IR to find the voltage.
4 V
V = I × R = 2 × 2 = 4 V.
5. A resistor carries 11 A and has resistance 46 Ω. Use V = IR to find the voltage.
506 V
V = I × R = 11 × 46 = 506 V.
6. A resistor carries 4 A and has resistance 19 Ω. Use V = IR to find the voltage.
76 V
V = I × R = 4 × 19 = 76 V.
7. A resistor carries 3 A and has resistance 38 Ω. Use V = IR to find the voltage.
114 V
V = I × R = 3 × 38 = 114 V.
8. A resistor carries 9 A and has resistance 33 Ω. Use V = IR to find the voltage.
297 V
V = I × R = 9 × 33 = 297 V.
9. A resistor carries 10 A and has resistance 39 Ω. Use V = IR to find the voltage.
390 V
V = I × R = 10 × 39 = 390 V.
10. A resistor carries 2 A and has resistance 25 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 2 × 25 = 50 V.
11. A resistor carries 3 A and has resistance 39 Ω. Use V = IR to find the voltage.
117 V
V = I × R = 3 × 39 = 117 V.
12. A resistor carries 5 A and has resistance 6 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 5 × 6 = 30 V.

12 questions · Seed 104733 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Take your time. Show your thinking.

1. A resistor carries 5 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 5 A · R = 18 Ω
2. A resistor carries 8 A and has resistance 23 Ω. Use V = IR to find the voltage.
I = 8 A · R = 23 Ω
3. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 6 A · R = 2 Ω
4. A resistor carries 2 A and has resistance 2 Ω. Use V = IR to find the voltage.
I = 2 A · R = 2 Ω
5. A resistor carries 11 A and has resistance 46 Ω. Use V = IR to find the voltage.
I = 11 A · R = 46 Ω
6. A resistor carries 4 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 4 A · R = 19 Ω
7. A resistor carries 3 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 3 A · R = 38 Ω
8. A resistor carries 9 A and has resistance 33 Ω. Use V = IR to find the voltage.
I = 9 A · R = 33 Ω
9. A resistor carries 10 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 10 A · R = 39 Ω
10. A resistor carries 2 A and has resistance 25 Ω. Use V = IR to find the voltage.
I = 2 A · R = 25 Ω
11. A resistor carries 3 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 3 A · R = 39 Ω
12. A resistor carries 5 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 5 A · R = 6 Ω

12 questions · Seed 104733 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Answers and reasoning. Review before teaching.

1. A resistor carries 5 A and has resistance 18 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 5 × 18 = 90 V.
2. A resistor carries 8 A and has resistance 23 Ω. Use V = IR to find the voltage.
184 V
V = I × R = 8 × 23 = 184 V.
3. A resistor carries 6 A and has resistance 2 Ω. Use V = IR to find the voltage.
12 V
V = I × R = 6 × 2 = 12 V.
4. A resistor carries 2 A and has resistance 2 Ω. Use V = IR to find the voltage.
4 V
V = I × R = 2 × 2 = 4 V.
5. A resistor carries 11 A and has resistance 46 Ω. Use V = IR to find the voltage.
506 V
V = I × R = 11 × 46 = 506 V.
6. A resistor carries 4 A and has resistance 19 Ω. Use V = IR to find the voltage.
76 V
V = I × R = 4 × 19 = 76 V.
7. A resistor carries 3 A and has resistance 38 Ω. Use V = IR to find the voltage.
114 V
V = I × R = 3 × 38 = 114 V.
8. A resistor carries 9 A and has resistance 33 Ω. Use V = IR to find the voltage.
297 V
V = I × R = 9 × 33 = 297 V.
9. A resistor carries 10 A and has resistance 39 Ω. Use V = IR to find the voltage.
390 V
V = I × R = 10 × 39 = 390 V.
10. A resistor carries 2 A and has resistance 25 Ω. Use V = IR to find the voltage.
50 V
V = I × R = 2 × 25 = 50 V.
11. A resistor carries 3 A and has resistance 39 Ω. Use V = IR to find the voltage.
117 V
V = I × R = 3 × 39 = 117 V.
12. A resistor carries 5 A and has resistance 6 Ω. Use V = IR to find the voltage.
30 V
V = I × R = 5 × 6 = 30 V.

12 questions · Seed 104733 · Age guidance, not curriculum certification