Using a battery, a 100 pF capacitor is charged to 60 V and then the battery is removed. After that, a second uncharged capacitor is connected to the first capacitor in parallel. If the final voltage a

Question

Using a battery, a 100 pF capacitor is charged to 60 V and then the battery is removed. After that, a second uncharged capacitor is connected to the first capacitor in parallel. If the final voltage across the second capacitor is 20 V, its capacitance is : (in pF)

TestHub · Accepted Answer

New potential = C 0 ​ + C C 0 ​ V 0 ​ ​ = 3 V 0 ​ ​ ​ 3 C 0 ​ V 0 ​ = C 0 ​ V 0 ​ + CV 0 ​ 2 C 0 ​ V 0 ​ = CV 0 ​ C ⇒ 2 C 0 ​ ​

Physics - Capacitor Question with Solution | TestHub

Options:

Doubts & Discussion