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(A) When a negative charge $(-q)$ is placed at the centre of a non-conducting sphere,it creates an electric field in the surrounding space.By definiti

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radially inward

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(A) When a negative charge $(-q)$ is placed at the centre of a non-conducting sphere,it creates an electric field in the surrounding space.By definition,the electric field lines for a negative point charge are directed towards the charge.Since the charge is at the centre of the sphere,the electric field lines at any point on the surface of the sphere will point towards the centre.Therefore,the direction of the electric field at any point on the surface is radially inward,as shown in the figure.

$A$ negative charge is placed at the centre of a non-conducting sphere. The direction of the electric field at any point on the surface of the sphere is

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