P = I2R

Find either P, I or R.

    Remember you will need to deal with I2 instead of just I

  1. I = 2 A, R = 30 W, P = ?
  2. I = 5 A, R = 5 kW, P = ?
  3. I = 200 mA, R = 12 kW,P = ?
  4. I = 30 mA, R = 50 MW, P = ?


    5. In these questions, don't forget to take the square root of I2.

  5. P = 2 500 W, R = 100 W, I = ?
  6. P = 320 W, R = 20 W, I = ?
  7. P = 256 kW, R = 4 kW, I = ?
  8. P = 1.2 mW, R = 3 W, I = ?


    9. Here, you must remember to square I before calculating R.

  9. P = 1600 W, I = 4 A, R = ?
  10. P = 1250 W, I = 2.5 A, R = ?
  11. P = 50.700 kW, I = 13 A, R = ?
  12. P = 40 mW, I = 10 mA, R = ?