Question

Calculate the oscillation frequency for the circuit in which R = 150 ohm, C = 20 microfarad, and L = 0.1 henry (H) ?​

Answer 1

Explanation:

Given - L=4.0H,C=100μF=100×10

−6

F,R=60Ω,V

rms

=240V

(i) for an L-C-R circuit to be in resonance ,

angular frequency ω=1/

LC

=1/

4.0×100×10

−6

=50rad/s

(ii) at resonant frequency , impedence =resistance ,

Z=R

therefore current I

rms

=V

rms

/Z=V

rms

/R

or I

rms

=240/60=4A

(III) the rms potential drop across inductor =I

rms

ωL

=4×15.81×4.0=252.96V