Page 423 - Basic Electrical Engineering
P. 423
a. 30°
b. 45°
c. 60°
d. 0°.
21. In a series resonant circuit, a change in supply voltage will cause a change in
a. the current drawn
b. the Q-factor q the circuit
c. the bandwidth of the circuit
d. the resonant frequency.
22. Which of the following conditions is true for both series and parallel resonance?
a. impedance is minimum
b. power factor is unity
c. power factor is zero
d. power is low.
23. The bandwidth of a series R–L–C circuit is
a.
b.
c.
d. .
24. The product of voltage and current in an ac circuit is called
a. active power
b. apparent power
c. average power
d. reactive power.
25. In a series resonance circuit
a. L = C
b. L = R
