question_answer

In the figure shown below, the charge on the left plate of the \[10\mu F\]capacitor is \[-30\,\mu C\]. The charge on the right plate of the \[6\,\mu F\]capacitor is-             [JEE Main 11-Jan-2019 Morning]

A) \[-18\,\mu C\]

B) \[-12\,\mu C\]

C) \[+12\,\mu C\]

D) \[+18\,\mu C\]

Correct Answer: D

Solution :

[d] Let and be the charge on andrespectively.

...(i)

Also,                                        (ii)

[ and  are in parallel combination]

(iii)

Using (i) and (iii),