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Exam Questions Papers - Engineering

Q1:

For parallel RLC circuit, which one of the following statements is NOT correct?

A The bandwidth of the circuit deceases if R is increased

B The bandwidth of the circuit remains same if L is increased

C At resonance, input impedance is a real quantity

D At resonance, the magnitude of input impedance attains its minimum value

ANS:D - At resonance, the magnitude of input impedance attains its minimum value

Bandwidth = Thus it is maximum at resonance.