Discussion Forum



1)

In the given circuit, a charge of +80 $\mu$ C is given to upper plate of a $4 \mu $F capacitor. At a steady state, the charge  on the upper plate  of the $3 \mu F$  capacitor is

108202112_m7.PNG


A) 60$\mu$ C

B) 48$\mu$ C

C) 80$\mu$ C

D) 0$\mu$ C

Answer:

Option B

Explanation:

 The net charge on upper plates both the capacitor   $(2 \mu F$ and $3\mu F)$ will be $+80 \mu C$  . So charge on upper plate of

$3 \mu C$  capacitor will be

          $q=\left(\frac{3}{3+2}\right)(80\mu C)$

 $ q= \frac{3}{5} \times 80$= $48 \mu C$