BSc Nursing GNM 2020 Solved Paper

Volume of sphere (earth) =‌

4

3

πR3
where, R is the radius of the sphere.
Area of the sphere =4πR2
Now, ‌‌‌

V

A

=‌

R

3

. . . (i)
Capacitance of a sphere,
C=4πε0R . . . (ii)
From Eqs. (i) and (ii), we get
C=4πε0(‌

3V

A

)=‌

12πε0V

A