Question

In the given circuit, find charge across the capacitor C, when steady state is reached.

• A. $6\mu C$
• B. $9\mu C$
• C. $18\mu C$
• D. None of these

Answer 1

The correct option is C $18\mu C$

R.E.F image

Capacitor circuit

When steady state is reached capacitor will

behave as open circuit Diagram is shown

$i=\frac{12+6}{3}$

$i=6A$

voltage across capacitor $=\left(v_c\right)$

$v_e=(-18+9)v$

$v_c=-9v$

$|v_c|=9v$

Charge a cross capacitor c

$q=cv$

$q=2\mu F\times qv$

$q=18\mu c$