twice of the axial point

half of the axial point

zero

not defined

As electric field inside conductor is always zero

If not normal than it will have component parallel to the surface and perpendicular to the surface

parallel component of the field will generate current along the surface, which is not possible

work done in moving the charge along the surface ha to be zero

$\frac{Kq^2}{100}$

$\frac{Kq^2}{16}$

$\frac{Kq^2}{10}$

zero

A

B

C

All are at same potential

F=Eq₀

F=E/Q

F=E/q₀

F=EQ

0

Q/e₀

2Q/e₀

Q/4*Pi*e₀

0

>0

<0

varies from negative to positive value from negative to positive charge.

$\overrightarrow{\ \tau\ }=\overrightarrow{E}\ \times\overrightarrow{p}\$

$\overrightarrow{\ \tau\ }=\frac{\overrightarrow{p}}{\overrightarrow{E}}\$

$\overrightarrow{\tau}=\overrightarrow{p}.\overrightarrow{E}$

$\ \frac{\sigma}{\epsilon_0},\ 0,\ \frac{\sigma}{\epsilon_0}\frac{R^2}{r^2}$

$\frac{\sigma}{\epsilon_0},\ \frac{\sigma}{\epsilon_0}\frac{R^2}{r^2},\ 0$

$\frac{\sigma}{\epsilon_0},\ 0,\ \frac{\sigma}{2\epsilon_0}$

 $[M^1L^3T^{-4}A^{-2}]$  

 $[M^{-1}L^{-3}T^2A^2]$  

 $[M^{-1}L^{-3}T^4A^2]$  

 $[M^{-1}L^{-2}T^4A^2]$