Assertion (A): Non-polar materials do not have any permanent dipole moment.
Reason (R) :When a non-polar material is placed in a electric field, the centre of the positive charge distribution of it's individual atom or molecule coinsides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.

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Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct and (R) is not the correct explanation of (A).

(A) is correct but (R) is not correct.

(A) is not correct but (R) is correct.

answer is C.

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Detailed Solution

S1 : In nonpolar molecules, centre of +ve chargecoincides with centre of –ve charge, hence netdipole moment is comes to zero.
S2 : When non polar material is placed in externalfield, centre of charges does not coincide, hencegive non zero moment in field

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