JEE Main 2022 · 26 Jun · Shift 1 · Physics Q41

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PhysicsSingle correct+4 / -1Question 41 of 90

Given below two statements : One is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Non-polar materials do not have any permanent dipole moment.

Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.

In the light of above statements, choose the most appropriate answer from the options given below.

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 and worked solution

Official answer: C

Assertion is correct: non-polar molecules have no permanent dipole.

Reason is wrong: in an electric field the centres of positive and negative charge are pulled apart, giving an induced dipole.

(C)

Topics:Dielectrics Electric dipole

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JEE Main 2022 · 26 Jun · Shift 1, Physics question 41