Power in ac circuits - class-XII

Casual Mode - Take your time!

1 / 25
✓
Correct
0
✗
Incorrect
0
★
Score
0%
Multiple Choice

An electrical device draws 2 kW power from ac mains voltage 223 V(rms). The current differs lags in phase by $\phi = tan^{-1} \left ( -\frac{3}{4} \right )$ as compared to voltage. The resistance R in the circuit is:

  1. 15 $\Omega$
  2. 20 $\Omega$
  3. 25 $\Omega$
  4. 30 $\Omega$
Change Mode