Saved Bookmarks
| 1. |
A series `LCR` circuit with `R = 20 Omega, L = 1.5 H` and `C = 35 mu F` is connected to a variable frequency `200 V` ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power in `kW` transferred to the circuit in one complete cycle?A. 200 WB. 2000 WC. 100 WD. 4000 W |
|
Answer» Correct Answer - B If the frequency of the ac equals thenatural frequency of the circuit, the impedance `Z=R=20 Omega` The average power dissipated per cycle, `P_(av)=(V_("rms")^(2))/(Z)=(V_("rms")^(2))/(R )=((200)^(2))/(20)=2000 W` |
|