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Q.

Statement I: The electric field due to a dipole on its axial line at a distance r is E. Then, electric field due to the same dipole on the equatorial line and at the same distance will be E2 .Statement II: Electric field due to dipole varies inversely as the square of distance.

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a

Both statements I and II are correct

b

Statement-I is correct and statement-II is incorrect

c

Statement-I is incorrect and statement-II is correct

d

Both statements I and II are incorrect

answer is B.

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Detailed Solution

We know that for an electric dipole,Eaxial =14πε02pr3  and Eequatorial =14πε0pr3Hence, from above equations,Eaxial 2=Eequatorial   Hence, Eequatorial =E2Statement II is false as electric field due to dipole varies inversely as cube of distance, i.e., E∝1r3.
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