Question

27 small drop each have potential 3 mv is combined tomake big drop the potiental of vig drop will be​

Answer 1

Answer:

B

Explanation:

Let R and r be the radii of bigger and each smaller drop.

Charge remains conserved.

Hence, charge on bigger drop

27× charge on smaller drop

i.e. q'=27q

Now, before and after coalescing, volume remains same. That is,

43πR3=27×43πr3

∴R=3r

Hence, capacitance of bigger drop

C'=4πε0R=4πε0(3r)

=3(4πε0r)=3C