Question 919: Electrostats & Capacitance

Question

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :

Accepted Answer

For inside
(r $$$$ R)
$$\oint {{{\overrightarrow E }_{out}}} .\overrightarrow {dS}  = {{{q_{en}}} \over {{\varepsilon _0}}}$$
Here, q
en
= Q
So, E
out
.4$$\pi $$r
2
= $${Q \over {{\varepsilon _0}}}$$
$$ 	herefore $$ E
out
$$ \propto $$ $${1 \over {{r^2}}}$$

Answer

zero as r increases for r < R, decreases as r  increases for r > R

Answer

zero as r increases for r < R, increases as r increases for r > R.

Answer

decreases as r increases for r < R and for  r > R.

Answer

increases as r increases for r < R and for r > R.

Electrostats & Capacitance

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :

Choose the correct answer: