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We have a fixed conductor having a cavity inside. There is a point charge `q_(1)` kept inside the cavity charge appearing at the inner surface of the cavity is `q_(2)`. Charge appearing at outer surface of conductor is `q_(3)` and there lies another point charge `q_(4)` out side the conductor. Whole situation is shown in figure. `q_(4)`. is held stationary by applying an external force `vecF_(0)` on it. Three points A, B and C are shown. Answer the following two questions. Q. If keeping the nature and position of `q_(1)` fixed, magnitude of `q_(1)` is changed, then choose the INCORRECT options(s)A. External force required to keep `q_(4)` stationary remains unchangedB. intensity of electric field at point C remains unchangedC. intensity of electric field at point B remains unchangedD. intensity of electric filed point B only due to `q_(2)` remains unchanged. |
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Answer» Correct Answer - A::B::D Answers are obvious using properties of conductor. |
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