Question

In LCR circuit, resonant frequency is $600\text{Hz}$ and half power points are at $650$ Hz and $550\text{Hz}$. The quality factor is

• A. $\frac{1}{6}$
• B. $\frac{1}{3}$
• C. $6$
• D. $3$

Answer 1

The correct option is C $6$


Quality factor is given by
$Q=\frac{f_0}{\Delta f}$
where $f_0$ is the resonant frequency and $\Delta f$ is the difference between frequencies at half power points.
Putting values we get
$Q=\frac{600}{650-550}=\frac{600}{100}=6$