Question

What charge would be required to electrify a sphere of radius 25cm so as to get a surface charge deb?

Answer 1

Explanation:

charge density σ=3/π cm^-2

radius=25 cm=0.25m

surface area =A=4πr^2

=4π(0.25)^2

now,

charge required is

Q=Aσ

=4π(0.25)^2*3/π

Thus Q=0.75 C