Question

Resonant frequency of a series LCR circuit is 600 Hz. Quality factor of the circuit is 4. Band width is

• A. 300 Hz
• B. 150 Hz
• C. 1200 Hz
• D. 450 Hz

Answer 1

Answer: (B)

Bandwidth of $LCR$ circuit is given by,
$2\Delta \omega =\frac{{\omega }_0}{Q}$ or $2\Delta \upsilon =\frac{{\upsilon }_0}{Q}$
Here, ${\upsilon }_0=600Hz,Q=4$
$\therefore$ Band width $=\frac{600}{4}=150Hz$