question_answer

A capacitor with capacitance \[5\mu F\]is charged to \[5\mu C.\]If the plates are pulled apart to reduce the capacitance to \[2\mu F,\]how much work is done? [JEE Main 9-4-2019 Morning]

A) \[3.75\times {{10}^{6}}J\]

B) \[2.55\times {{10}^{6}}J\]

C) \[2.16\times {{10}^{6}}J\]

D) \[6.25\times {{10}^{6}}J\]

Correct Answer: A

Solution :

[a] Work done

Option