A hollow insulated conducting sphere is given a positive charge of 10. What will be the electric field at the centre of the sphere if its radius is 2 m? (a) Zero (b) 5 m⁻² (c) 20 m⁻² (d) 8 m⁻²

Answer: (a). The charge sits on the outer surface of the hollow conducting sphere. A Gaussian sphere through the centre region encloses no charge, so E = 0 at the centre. So the answer is (a) zero.

A hollow insulated conducting sphere is given a positive charge of… | NEET 1998 (AIPMT)

Q133NEET 1998 · AIPMTEasy

Electric Flux & Gauss's Law

A hollow insulated conducting sphere is given a positive charge of $10\ \mu\text{C}$ . What will be the electric field at the centre of the sphere if its radius is $2\text{ m}$ ?

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Answer: (a)

The charge sits on the outer surface of the hollow conducting sphere.
A Gaussian sphere through the centre region encloses no charge, so $E = 0$ at the centre.
So the answer is (a) zero.

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