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  4. Assertion: On going away from a point charge or a small electric dipole, electric field decreases at the same rate in both the cases. Reason: Electric field is inversely proportional to square of distance from the charge or on electric dipole.

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Q. Assertion: On going away from a point charge or a small electric dipole, electric field decreases at the same rate in both the cases.
Reason: Electric field is inversely proportional to square of distance from the charge or on electric dipole.

AIIMSAIIMS 2013Electric Charges and Fields

Solution:

D Both Assertion and Reason are incorrect. For electric dipole, the field falls as cube of distance from the dipole center. But for point charge, it falls as square of distance. So, assertion and reason are both incorrect.