Question

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

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

Answer 1

The correct option is E $E=0$ and $V=$ constant

Surface charge density $=\sigma$.
Inside the surface, the electric field is zero.
$\Rightarrow E_{inside}=0$
$\because V_{inside}=V_{surface}$
The potential inside the surface of charged sphere is constant.
$\therefore E=0,V=$constant.