ElectrostaticsHard

Question

At distance of 5cm and 10cm outwards from the surface of a uniformly charged solid sphere, the potentials are 100V and 75V respectively. Then :

Options

A.Potential at its surface is 150V.
B.The charge on the sphere is (5/3) × 10-9C.
C.The electric field on the surface is 1500 V/m.
D.The electric potential at its centre is 225V.

Solution

= 100 V    & =  75 V
∴    Q = ,  r = 10 cm
∴    Vsurface =  = 150V    Esurface = = 1500 V/m
Vcentre = Vsurface = × 150 = 225 V

Create a free account to view solution

View Solution Free
Topic: Electrostatics·Practice all Electrostatics questions

More Electrostatics Questions

When charge is given to a soap bubble, it shows :...The electric field in a region is directed outward and is proportional to the distance r from the origin. Taking the ele...The figure shows some of the electric field lines corresponding to an electric field. The figure suggests :-...A flat circular fixed disc has a charge +Q uniformly distributed on the disc. A charge +q is thrown with kinetic energy ...A particle of mass m and charge q is thrown in a region in a region where uniform gravitational field and electric field...