The source frequency which drives the circuit in resonance is:
A) 4 Hz
B) 5 Hz
C) 6 Hz
D) 8 Hz
Correct Answer: D
Solution :
(d) 8 Hz Here, \[L=5\,H,\,\,C=80\,\mu F=80\times {{10}^{-6}}F;R=40\Omega \] \[{{V}_{rms}}=230\,V\] The resonant angular frequency is \[{{\omega }_{r}}=\frac{1}{\sqrt{LC}}=\frac{1}{\sqrt{5\times 80\times {{10}^{-6}}}}=50\,rad\,{{s}^{-1}}\] \[\therefore {{v}_{r}}=\frac{{{\omega }_{r}}}{2\pi }=\frac{50}{2\pi }=8\,Hz\]
You need to login to perform this action.
You will be redirected in
3 sec
