question_answer

In figure, there is a four way key at the middle. If key is shown from situation BD to AD, then how much charge will flow through point O?

A) \[24\mu C\]

B) \[36\mu C\]

C) \[72\mu C\]

D) \[12\mu C\]

Correct Answer: C

Solution :

[c] When key is on the position BD, the situation is shown in the figure. When key is on the position AD, the situation is shown in the figure.         The charge flows to each capacitor is \[36\text{ }\mu C,\]and so total charge flows through point O is\[\text{72 }\mu C\].