Question

if a capacitor of capacitance 10^2/π μF is connected across 220V, 50Hz A.C, the capacitive reactance is
a) 1000 ohm
b) 100 ohm
c) 10 ohm
d) zero

WITH EXPLANATION​

Answer 1

Answer

RMS value of applied voltage = 200 V

Impedance of a capacitor is given by:

X

C

=

2πfC

1

Hence, rms current through it is:

I=

X

C

V

I=200×2×π×50×10×10

−6

I=0.2π A

Peak current, I

max

=

2

I

=0.628

2

A