For a certain series LCR circuit

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

For a certain series LCR circuit, the current amplitude is maximum at

\omega = 4.0\times10^{3}\,\text{rad s}^{-1}

. The amplitude falls to

I_{\max}/\sqrt{2}

\omega = 3.6\times10^{3}\,\text{rad s}^{-1}

and

\omega = 4.4\times10^{3}\,\text{rad s}^{-1}

. The quality factor

Q

of the circuit is (a)

10

(b)

2.5

(c)

5

(d)

15.7