Question

If BW is bandwidth, \( \omega_r \) is resonant frequency and Q is quality factor of a resonant circuit, then Selectivity is defined as:

• A. \( \frac{\omega_r}{Q} \)
• B. \( Q \)
• C. \( \frac{\omega_r}{BW} \)
• D. \( BW \)

Hint:

Higher selectivity implies sharper resonance — the circuit responds strongly at resonant frequency and rejects nearby frequencies.

Answer 1

The Correct Option is C

Selectivity (S) of a resonant circuit is defined as: \[ S = \frac{\omega_r}{BW} \]