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NDA NA I 2017 Q143

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1. 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 = q/4(pi)(epsilon0)r for a < r < b

E = q/4(pi)(epsilon0)a for r < a

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NDA NA I 2017 Q143

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