Questions
A capacitor of capacity is charged to the potential of . On disconnecting from the battery, it is connected with a capacitor of capacity as shown in the adjoining figure. The ratio of energies of system of capacitors before and after the connection of switch ‘’ will be
detailed solution
Correct option is A
Given Capacity of capacitor =C1,C2Potential V1=V0We know Common potential V=C1V1+C2V2C1+C2Common potential, V=C1V0+0C1+C2=C1V0C1+C2We know potential energy stored in capacitor, U=12CV2Now UiUf=12C1V0212C1+C2V2=C1+C2C1Therefore, the correct answer is (A)Talk to our academic expert!
Similar Questions
A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. What is the common potential (in V) and energy lost (in J) after reconnection?
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