Question

One hundred twenty five small liquid
drops, each carrying a charge of
0.5 uC and each of diameter 0.1 m form
a bigger drop. Calculate the potential at
the surface of the bigger drop.​

Answer 1

Answer:

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PHYSICS

64 spherical drops each of radius 2 cm and carrying 5 C charge combine to form a bigger drop. Its capacity is:

ANSWER

Let Q be the charge on each drop

⇒ Voltage on each drop: V=

r

KQ

We know: C=

V

Q

or, C=

KQ

Qr

or, C=

k

r

Equating the sum of volume of drops to the volume of bigger drop:

64×

3

4

πr

3

=

3

4

πR

3

So, radius of final drop: R=(64)

3

1

r=4r

∴C

′

=

K

R

=

9×10

9

4×2×10

−2

=

9

8

×10

−11

F

Explanation:

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