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Networks Analysis and Synthesis - Engineering

Q1:

A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be

A 0.5 A

B more than 0.5 A

C less than 0.5 A

D 0.5 A or less

ANS:C - less than 0.5 A

Since C increases, the circuit will not be in resonance. Therefore, current decreases (In series resonant circuit current is maximum at resonance).