Physics - Capacitor Question with Solution | TestHub
A parallel plate capacitor of capacitance ' ' is connected to a battery and charged to a potential difference ' '. Another capacitor of capacitance 3 C is similarly charged to a potential difference 3 V . The charging battery is then disconnected and capacitors are connected in parallel to each other in such a way that positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is
Options:
Answer:
Solution:
Initial charge on the first capacitor,
Initial charge on the second capacitor,
When the capacitors are connected in parallel with opposite polarities, the net charge is
The equivalent capacitance of the parallel combination is
The final energy of the configuration is given by
Substituting the values,
Answer:
