Question

028. A circuit draws 330W from a 110V, 60Hz AC
line. The power factor is 0.6 and the current lags the
voltage. The capacitance of a series capacitor that
will result in a power factor of unity equal to :
1) 31uF 2) 54uF 3) 151uF 4) 201uF​

Answer 1

Answer:

answer is 4) 201micro farads

Explanation:

w K T

power P =VICOS(phi)

I=P/VCOS(phi)

I=330/110*0.6

I=5A

again

v=iz

z=v/i

=110/5

=22 ohms

at UPF cos(phi)=1

1=R/Z

=R=Z=1/2πfC

=1/2π60× 201micro

it is approximately 22ohms

hence ans is 201 micro farads

Answer 2

Answer:

ans is 3) 151 micro farad

I have seen many answers on net but all are wrong !!

this is right one