Question

The plot given below is of the average power delivered to an LRCLRC circuit versus frequency. The quality factor of the circuit is:

• A. $5.0$
• B. $2.0$
• C. $2.5$
• D. $0.4$

Answer 1

Answer: (B)

$2.0$

From the graph,

Resonating frequency, ($w_0=5K{H}_z$ (at which peak occurs)]

and Bandwidth, $\left(2\Delta w\right)=2.5K{H}_z$ (frequency difference when power in half of peak)

So quality factor,$Q=\frac{w_0}{2\Delta w}=\frac{5}{2.5}=2$