NEETPhysicsElectrostatics
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): For an isolated uncharged solid conducting sphere with an off-center cavity containing a point charge q , the magnitude of the electric field at a point outside the sphere is greater on the side closer to the cavity. Reason (R): The induced charge on the outer surface of the sphere distributes unif
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is incorrect
- D(A) is incorrect but (R) is correct
Correct answer
D. (A) is incorrect but (R) is correct
Step-by-step solution
The Assertion is incorrect. For an isolated uncharged solid conducting sphere with a cavity containing a point charge q , the electric field outside the sphere depends only on the charge distribution on its outer surface. It does not depend on the position of the cavity or the charge inside it. The Reason is correct. The point charge q induces a charge -q on the inner surface of the cavity and a charge +q on the outer surface of the sphere. Because the outer surface is perfectly spherical and there are no external