Question

A circuit consists of two capacitors, a 24 V battery and an A C source connected as shown in the figure. The A C voltage is given by varepsilon=(20 cos 120 pi t) volt, where t is in second
a)charge on capacitor C_2 as function of time Q_2=(30µC)cos(120Πt)=36µC
b) steady state current is 33.9mA sin (120Πrt+Π)
c)maximum energy stored in capacitor C_1 & C_2 is 36 mJ
d)minimum energy stored in capacitors C_1 and C_2 is 36µJ

Answer 1

Answer:

I

rms

=

R

V

(at resonance)

6=

R

24

∴R=4Ω

I

dc

=

R+r

V

=

4+4

12

=1.5A