GCSE Physics – Power and potential difference

Last updated: 06/05/2020

Learning Objectives

-I can describe how power in a circuit is related to the potential difference
-I can use, rearrange and can recall the units needed for P = VI
-I can use, rearrange and can recall the units needed for P = I2^2R

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  1. Current
  2. Review
  3. Answered
  1. What is potential difference the same as?

    • 1.
    • 2.
    • 3.
    • 4.
  2. What is the unit for power?

    • 1.
    • 2.
    • 3.
    • 4.
  3. What is the unit for potential difference?

    • 1.
    • 2.
    • 3.
    • 4.
  4. What is the unit for current?

    • 1.
    • 2.
    • 3.
    • 4.
  5. What is the relationship between power, potential difference and current?

    • 1.
    • 2.
    • 3.
    • 4.
  6. What is the relationship between power, current and resistance?

    • 1.
    • 2.
    • 3.
    • 4.
  7. What is the unit for resistance?

    • 1.
    • 2.
    • 3.
    • 4.
  8. The voltage of a component is 1200 V and the current is 0.2 A, so what is the power?

    • 1.
    • 2.
    • 3.
    • 4.
  9. The voltage of a component is 0.002 V and the current is 0.04 A, so what is the power?

    • 1.
    • 2.
    • 3.
    • 4.
  10. The voltage of a component is 6 V and the current is 3 A, so what is the power?

    • 1.
    • 2.
    • 3.
    • 4.
  11. The voltage of a component is 12 V and the current is 5 A, so what is the power?

    • 1.
    • 2.
    • 3.
    • 4.
  12. If the power is 160 W and potential difference is 40 V, what is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.
  13. If the power is 200W and potential difference is 0.04V, what is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.
  14. If the power is 20 W and potential difference is 5 V, what is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.
  15. What is the voltage across a component that has 6,000 A of current and 36,000,000 W of power?

    • 1.
    • 2.
    • 3.
    • 4.
  16. What is the voltage across a component that has 1,000,000 A of current and 1 W of power?

    • 1.
    • 2.
    • 3.
    • 4.
  17. What is the voltage across a component that has 11 A of current and 121 W of power?

    • 1.
    • 2.
    • 3.
    • 4.
  18. What is the voltage across a component that has 45 A of current and 324 W of power?

    • 1.
    • 2.
    • 3.
    • 4.
  19. What is the voltage across a component that has 12 A of current and 36 W of power?

    • 1.
    • 2.
    • 3.
    • 4.
  20. What is the power if the current is 16 A and the resistance is 2 Ω?

    • 1.
    • 2.
    • 3.
    • 4.
  21. What is the power if the current is 3 A and the resistance is 0.34 Ω?

    • 1.
    • 2.
    • 3.
    • 4.
  22. What is the power if the current is 2 A and the resistance is 20 Ω?

    • 1.
    • 2.
    • 3.
    • 4.
  23. The power is 80 W and resistance is 20 Ω. What is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.
  24. The power is 100 W and resistance is 5 Ω. What is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.
  25. The power is 10 W and resistance is 40 Ω. What is the current through the component?

    • 1.
    • 2.
    • 3.
    • 4.