NDA 2022 Physics question

The electric field lines from an isolated positively charged conducting sphere are

(A)tangential to the conducting surface
(B)at right angles to the conducting surface and towards the centre of the sphere
(C)at any angle to the conducting surface
(D)at right angles to the conducting surface and outwards from the centre of the sphereCorrect

Answer: (D)

Solution

The surface of a charged conductor is an equipotential surface, so the electric field lines must be perpendicular to it; a tangential component would make the charges move. Field

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Question ID VK-032047