MHT CET 2025 Physics question

Physics Electrostatic Potential and Capacitance MHT CET 2025

A conducting sphere of radius 'R' is given a charge 'Q' uniformly. The electric field and the electric potential at the centre of the sphere are respectively ( = permittivity of free space)

(A)zero and Correct
(B) and zero
(C) and
(D)zero and zero

Answer: (A)

Solution

In a conductor in electrostatic equilibrium all the charge resides on the surface and the electric field inside is zero, so at the centre . Since everywhere inside, the potential is constant inside and equal to the potential on the surface:

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Question ID VK-101289