Question

7. If the maximum circumference of a sphere is 2 m,
then its capacitance in water would be :-
(Dielectric constant of water = 81)
(2) 2385 pF
(1) 27.65 pF
(3) 236.5 pF
(4) 2865 pF​

Answer 1

Answer:

Correct option is

D

2865 pF

Given,

ε

0

=8.85×10

−12

ε

r

=81

Perimeter, L=2πr=2m

r=

π

1

The capacitance in water,

C=4πε

0

ε

r

r

C=4π×8.85×10

−12

×81×

π

1

C=2865pF

The correct option is D.