Question

identical drops of mercury are charged simultaneously with the same potential of . Assuming the drop to the spherical, if all the charged drops are made to combine to form one large drop, then its potential will be _____ .

A

B

C

D

Easy

Solution

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Correct option is B)

The volume of spheres.

where, and are the volume of smaller and bigger sphere respectively.

Now, initial potential of smaller sphere,


Charge on spheres, we have

Now, charge on bigger sphere

Now,

.

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