AP EAPCET 25-Aug-2021 Shift 2 Paper

Dielectric constant of water, k=80
Capacitance of a sphere of radius R is given by
C=4πε0R
Circumference of sphere, L=3m
Radius of sphere, R=

L

2π

⇒ =

3

2π

m
Capacitance, C=4πε0×

3

2π

=6ε0F
Capacitance of sphere in water,
C′=C×k
=80×6ε0
⇒ =480ε0
=480×8.854×10−12F
=4249.92×10−12F
= 4250 pF