STANDARD Physics Electric Field MCQ Question
A solid sphere of radius R, is charged uniformly with a total charge Q. Then the correct expression for electric field is (r = distance from centre) :-
KQr/R³, where r < R
KQ/r², where r ≥ R
it is zero, at all points
(1) and (2) both
Correct Answer
Detailed Explanation
Inside the sphere (r < R), the electric field is given by KQr/R³ due to the uniform charge distribution. Outside the sphere (r ≥ R), it behaves like a point charge, so the electric field is KQ/r².
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