Question

When would the electric field at a point due to a uniformly charged glass bangle and a point charge of the same magnitude have the same value.l​

Answer 1

Answer:

Answer:

(i) At a point P outside the spherical shell :

Let

E

be the electric field at P. The electric field through an elemental surface d

s

is

dϕ=

E

.d

s

∴ Total electric flux through the gaussian surface is

ϕ=∮

S

​

Eds=E∮

S

​

ds=E×4πr

2

ϕ=

ϵ

0

​

q

​

E×4πr

2

=

ϵ

0

​

q

​

E=

4πϵ

0

​

1

​

.

r

2

q

​

(for r>R)

(ii) At a point P inside the spherical shell:

In this case charge enclosed =0

E×4πr

2

=0

E=0 (for r<R)

Explanation: