Question 21:
easy
In series LCR circuit voltage across L, C & R is 20V each. If capacitor is short-circuited then
voltage across inductor is :
Question 22:
moderate
Which of the following plot correctly depicts the variation of phase difference between voltage and current in a series L-C AC circuit ?
1. 
2. 
3. 
4. 
Question 23:
moderate
When S1 is closed and S2 is open, \[V_{L}=V_{R}=V_{C}=10V\]. What will be the value of
\[V_{C}\] if S1 opened and S2 is closed ?
Question 24:
easy
A coil has power factor of 0.707 at 60 Hz. Then its power factor at 180 Hz will be :-
Question 25:
easy
A variable inductor is connected to an ac source. What effect does increasing the inductance have on the reactance and current in this circuit ?
Question 26:
easy
A variable capacitor is connected to an ac source. What effect does decreasing the capacitance have on the reactance and current in this circuit ?
Question 27:
moderate
In the circuit of Figure, the volmeter reads 75 V.Value of C is :
