Question

A charge Q is placed at a distance
r from a point P. The potential at
P is V. A charge - Q is placed at
another point at a distance n from
p. The potential at P will now be
)
(A) zero(B) 2V, (c) V/2(D) 3V.
explain the answer also​

Answer 1

Answer:

Potential at P due to point charge is V=

r

kq

Since radius of hollow sphere is R=4r so point P inside the hollw sphere.Now the potential at P =V

in

=V

surface

=

R

k(2q)

=

4r

2kq

=

2r

kq

=V/2