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Which mechanism causes increased susceptibility to interference when tuning a radio receiver?

A)Increased intermediate frequency bandwidth
B)Enhanced local oscillator stability
C)Decreased quality (Q) factor
D)Elevated automatic gain control threshold

💡 Explanation

A decreased Q factor broadens the resonant bandwidth, because bandwidth expansion is inversely proportional to Q through the resonance mechanism. Therefore radio picks up unwanted signals rather than solely desired frequency band, due to increased susceptibility.

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