Question

Choose the correct option: (1) Electric field inside charged conducting sphere is constant and non-zero. (2) Electric field on the surface of charged conducting sphere is sigma/280 (c) The direction of electric field on the surface charged conducting sphere is perpendicular to surface. (d) Electric potential inside the charged conducting sphere is 0​

Answer 1

Explanation:

We interpret the question as referring to the field just outside the sphere (that is, at locations roughly equal to the radius r of the sphere). Since the area of a sphere is A=4πr

2

and the surface charge density is σ=q/A (where we assume q is positive for brevity),then

E=

ϵ

0

σ

=

ϵ

0

1

(

4πr

2

q

)=

4πϵ

0

1

r

2

q

which we recognize as the field of a point charge .