Questions
Two capacitors of capacitance C and 2C are charged to potential differences V and 2V , respectively . These are then connected in parallel in such a manner that the positive terminal of one is connected to the negative terminal of the other . The final energy of this configuration is :
detailed solution
Correct option is D
Qfinal = 4CV−CV=3CVCnet = C+2C =3C⇒Ufinal=12Qfinal2Cnet⇒Ufinal=123CV23C⇒Ufinal=32CV2Talk to our academic expert!
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Two insulated charged conducting spheres of radii 20 cm and 15 cm respectively and having an equal charge of 10C are connected by a copper wire and then they are separated. Then
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