Multiple choice

Consider if three resistors R1, R2, R3 are connected in parallel and dissipate 20 W by each resistor. Calculate total power?

  1. 20 W

  2. 1 W

  3. 30 W

  4. 60 W

  5. 3 W
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The total power dissipated by the circuit can also be calculated by multiplying the total current squared times the total resistance. P = I2R + I2R + I2R P= P1 + P2 + P3 P= 20 + 20 + 20 P = 60 W.

Keep practicing — related questions