Question

the value of electric potential at a distance r from a point charges will be obtion (a) proportional to r(b) inversely proportional to r (c) proportional to r2(d) inversely proportional to r3​

Answer 1

Answer:

(a) An electric dipole of dipole moment

p

consists of point charges +q and −q separated by a distance 2a apart. Deduce the expression for the electric field

E

due to the dipole at a distance x from the centre of the dipole on its axial line in terms of the dipole moment

p

. Hence show that in the limit X>>a,

E

→2

p

/(4πϵ

0

x

3

).

(b) Given the electric field in the region

E

=2x

i

^

, find the net electric flux through the cube and the charge enclosed by it

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