Question

The electrostatic potential inside a charged spherical ball is given by V= ar² + b where r is the distance from the centre, a and b are constants. Then charge density inside the ball is 

a) - 24πaεr 

b) - 6πaεr 

c) - 24πaε

d) - 6πaε

Answer 1

Correct option is:  d) - 6πaε