Question

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}}\ne 0 $
• C. $ {{E}_{A}}\ne 0,{{E}_{B}}=0,{{E}_{C}}\ne 0 $
• D. $ {{E}_{A}}\ne 0,{{E}_{B}}\ne 0,{{E}_{C}}\ne 0 $
• E. none of the above

Answer 1

Answer: (B)

Correct answer is (b) $ {{E}_{A}}=0,{{E}_{B}}=0,{{E}_{C}}\ne 0 $