A positive charge q is placed at the centre of a hollow metallic sphere of inner radius a and outer ...........

General Science (NDA) Physics

A positive charge + q is placed at the centre of a hollow metallic sphere of inner radius a and outer radius b. The electric field at a distance r from

the centre is denoted by E. In this regard, which one of the following statements is correct?

E = 0 for a < r < b

E = 0 for r < a

$E =\frac{q}{4\pi\epsilon_{0}r}\: for\: a<r<b$

$E =\frac{q}{4\pi\epsilon_{0}r}\: for\: r<a$

Explanation:

The elec tric field in side a hollow metallic sphere, is zero at every point for r < a. It does not depend upon the position of charge in side the hol low sphere.