Question

Which of the following can be used to offer a higher impedance to all frequencies except the resonant frequency?

A. RL time constant circuit
B. Parallel LC circuit
C. RC time constant circuit
D. Series LC circuit

Answer 1

D. Series LC circuit

Step-by-step explanation:

can be used to offer a higher impedance to all frequencies except the resonant frequency.

Answer 2

D. Series LC circuit

Step-by-step explanation:

Impedance changes monotonically with frequency for an RC or RL circuit. A parallel LC circuit has a maximum of impedance at resonance. Only the series LC circuit will have its lowest impedance at resonance, and a higher impedance elsewhere in the frequency spectrum.