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A resonant circuit is a simple form of bandpass filter.

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A resonant circuit is a simple form of bandpass filter.

(a) True

(b) False

This question was addressed to me in an online interview.

This key question is from Instantaneous Frequency and Frequency Modulation in portion Angle Modulation of Analog Communications

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The correct option is (a) True

Explanation: The quality factor Q, of a resonant circuit is a measure of quality of resonant circuit, thus indicating the performance of the resonant circuit. Bandwidth can be seen as the ratio of the resonant frequency to quality factor. A higher value for Q means a more narrow bandwidth, which we want in many applications.

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