Considering outer spherical shell is nonconducting
Electric field inside a metal sphere is zero.
${r}<{R} \Rightarrow {E}=0$
${r}>{R} \Rightarrow {E}=\frac{{kQ}}{{r}^{2}}$
Option $(1)$
Considering outer spherical shell is conducting
${r}<{R},{E}=0$
${R} \leq {r}<{a} \quad\quad {E}=\frac{{kQ}}{{r}^{2}}$
${a} \leq {r}<{b},\quad\quad {E}=0$
${r} \geq {b} \quad\quad\quad\quad\quad {E}=\frac{{kQ}}{{r}^{2}}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$Y :$ The resistivity of a semiconductor decreases with increases of temperature.
$Z :$ In a conducting solid, the rate of collision between free electrons and ions increases with increase of temperature.
Select the correct statement from the following :
