Question

As shown in the figure, a point charge $Q$ is placed at the centre of conducting spherical shell of inner radius $a$ and outer radius $b$. The electric field due to charge $Q$ in three different regions I, II and III is given by: (I: r $<$ a, II: $a$<$r$<$b$, III: $r$>$b)$

• A. $E_I=0, E_{I I}=0, E_{I I I}=0$
• B. $E_I \neq 0, E_{I I}=0, E_{I I}=0$
• C. $E_I=0, E_{I I}=0, E_{I I I} \neq 0$
• D. $E_I \neq 0, E_{I I}=0, E_{I I I} \neq 0$

Answer 1

Answer: (D)

$E_I \neq 0, E_{I I}=0, E_{I I I} \neq 0$

Answer 2

The correct answer is (D) : $E_I \neq 0, E_{I I}=0, E_{I I I} \neq 0$
Electric field inside material of conductor is zero.