Q. A conductor having a cavity is given a positive charge. Then field strengths $E_{A},E_{B}$ and $E_{C}$ at point A (within cavity), at B (within conductor but outside cavity) and C (near conductor) respectively will be
A) $E_{A} = 0,\ E_{B} = 0,E_{c} = 0$
B) $E_{A} = 0,\ E_{B} = 0,E_{c} \neq 0$
C) $E_{A} \neq 0,E_{B} = 0,E_{C} \neq 0$
D) $E_{A} \neq 0,\ E_{B} \neq 0,E_{C} \neq 0$
Explanation
The correct answer is Option B: $E_{A} = 0,\ E_{B} = 0,E_{c} \neq 0$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.