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 7 A and has resistance 12 Ω. Use V = IR to find the voltage.
I = 7 A · R = 12 Ω
2. A resistor carries 12 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 12 A · R = 31 Ω
3. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 8 A · R = 43 Ω
4. A resistor carries 10 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 10 A · R = 9 Ω
5. A resistor carries 6 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 6 A · R = 9 Ω
6. A resistor carries 8 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 8 A · R = 9 Ω
7. A resistor carries 1 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 1 A · R = 37 Ω
8. A resistor carries 9 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 9 A · R = 18 Ω
9. A resistor carries 10 A and has resistance 26 Ω. Use V = IR to find the voltage.
I = 10 A · R = 26 Ω
10. A resistor carries 12 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 12 A · R = 6 Ω
11. A resistor carries 3 A and has resistance 16 Ω. Use V = IR to find the voltage.
I = 3 A · R = 16 Ω
12. A resistor carries 8 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 8 A · R = 47 Ω

12 questions · Seed 43 · 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 7 A and has resistance 12 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 7 × 12 = 84 V.
2. A resistor carries 12 A and has resistance 31 Ω. Use V = IR to find the voltage.
372 V
V = I × R = 12 × 31 = 372 V.
3. 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.
4. A resistor carries 10 A and has resistance 9 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 10 × 9 = 90 V.
5. A resistor carries 6 A and has resistance 9 Ω. Use V = IR to find the voltage.
54 V
V = I × R = 6 × 9 = 54 V.
6. A resistor carries 8 A and has resistance 9 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 8 × 9 = 72 V.
7. A resistor carries 1 A and has resistance 37 Ω. Use V = IR to find the voltage.
37 V
V = I × R = 1 × 37 = 37 V.
8. A resistor carries 9 A and has resistance 18 Ω. Use V = IR to find the voltage.
162 V
V = I × R = 9 × 18 = 162 V.
9. A resistor carries 10 A and has resistance 26 Ω. Use V = IR to find the voltage.
260 V
V = I × R = 10 × 26 = 260 V.
10. A resistor carries 12 A and has resistance 6 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 12 × 6 = 72 V.
11. A resistor carries 3 A and has resistance 16 Ω. Use V = IR to find the voltage.
48 V
V = I × R = 3 × 16 = 48 V.
12. A resistor carries 8 A and has resistance 47 Ω. Use V = IR to find the voltage.
376 V
V = I × R = 8 × 47 = 376 V.

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Take your time. Show your thinking.

1. A resistor carries 7 A and has resistance 12 Ω. Use V = IR to find the voltage.
I = 7 A · R = 12 Ω
2. A resistor carries 12 A and has resistance 31 Ω. Use V = IR to find the voltage.
I = 12 A · R = 31 Ω
3. A resistor carries 8 A and has resistance 43 Ω. Use V = IR to find the voltage.
I = 8 A · R = 43 Ω
4. A resistor carries 10 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 10 A · R = 9 Ω
5. A resistor carries 6 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 6 A · R = 9 Ω
6. A resistor carries 8 A and has resistance 9 Ω. Use V = IR to find the voltage.
I = 8 A · R = 9 Ω
7. A resistor carries 1 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 1 A · R = 37 Ω
8. A resistor carries 9 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 9 A · R = 18 Ω
9. A resistor carries 10 A and has resistance 26 Ω. Use V = IR to find the voltage.
I = 10 A · R = 26 Ω
10. A resistor carries 12 A and has resistance 6 Ω. Use V = IR to find the voltage.
I = 12 A · R = 6 Ω
11. A resistor carries 3 A and has resistance 16 Ω. Use V = IR to find the voltage.
I = 3 A · R = 16 Ω
12. A resistor carries 8 A and has resistance 47 Ω. Use V = IR to find the voltage.
I = 8 A · R = 47 Ω

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Answers and reasoning. Review before teaching.

1. A resistor carries 7 A and has resistance 12 Ω. Use V = IR to find the voltage.
84 V
V = I × R = 7 × 12 = 84 V.
2. A resistor carries 12 A and has resistance 31 Ω. Use V = IR to find the voltage.
372 V
V = I × R = 12 × 31 = 372 V.
3. 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.
4. A resistor carries 10 A and has resistance 9 Ω. Use V = IR to find the voltage.
90 V
V = I × R = 10 × 9 = 90 V.
5. A resistor carries 6 A and has resistance 9 Ω. Use V = IR to find the voltage.
54 V
V = I × R = 6 × 9 = 54 V.
6. A resistor carries 8 A and has resistance 9 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 8 × 9 = 72 V.
7. A resistor carries 1 A and has resistance 37 Ω. Use V = IR to find the voltage.
37 V
V = I × R = 1 × 37 = 37 V.
8. A resistor carries 9 A and has resistance 18 Ω. Use V = IR to find the voltage.
162 V
V = I × R = 9 × 18 = 162 V.
9. A resistor carries 10 A and has resistance 26 Ω. Use V = IR to find the voltage.
260 V
V = I × R = 10 × 26 = 260 V.
10. A resistor carries 12 A and has resistance 6 Ω. Use V = IR to find the voltage.
72 V
V = I × R = 12 × 6 = 72 V.
11. A resistor carries 3 A and has resistance 16 Ω. Use V = IR to find the voltage.
48 V
V = I × R = 3 × 16 = 48 V.
12. A resistor carries 8 A and has resistance 47 Ω. Use V = IR to find the voltage.
376 V
V = I × R = 8 × 47 = 376 V.

12 questions · Seed 43 · Age guidance, not curriculum certification