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RLC Circuits and Resonance - Technical MCQs

Q1:

The bandwidth is ______ in the given circuit.

A 179.28 Hz

B 3.54 kHz

C 4.44 kHz

D 15.85 kHz

ANS:B - 3.54 kHz

Q = Fr/B.W.
Fr = 1/2 * pi * Sq.(LC).
Q = 1/R * Sq.(L/C).

Rt = R1 + Rw = 33 + 7 = 40 Ohm.

Finally, B.W = R/2 * pi * L.
B.W = 40/(6.28 * 1.8 * 10^-3),
B.W = 3.5385 KHz.