Question

A conductor with a cavity is charged positively and its surface charge density is $\sigma$. If $E$ and $V$ represent electric field and potential, then inside the cavity

• A. $\sigma = 0$ and $V = 0$
• B. $E = 0$ and $V = 0$
• C. $E = 0$ and $\sigma = \text{constant}$
• D. $V = 0$ and $\sigma = \text{constant}$
• E. $E = 0$ and $V = \text{constant}$

Hint:

Inside any conductor (and empty cavity inside it), electric field is zero and potential is uniform.

Answer 1

Answer: (E)