Question

For L-C-R, A.C circuit, resonance frequency 600 Hz and frequencies at half power points are 550 Hz and 650 Hz. What Will be the Q factor?

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

Answer 1

The correct option is C 6

$$\begin{array}{c}Accordingtoqueation.........\\ BandWidth\left(BW\right)=\Delta f=fh-fl=650-550=100\\ fl=fc-\Delta f/2=650-50=600\\ fh=fc+\Delta f/2=550+50=600\\ Q=fc/BW=\left(600Hz\right)/\left(100Hz\right)=6.\\ sotheoptionisC.\end{array}$$