Physics · Electrostatic Potential
हिन्दीGiven below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In a polar substance, in the absence of an external electric field, the material exhibits zero net dipole moment. Reason (R): A non-polar molecule develops an induced dipole moment only when placed in an external electric field. In the light of the above statements, choose the correct answer from the options given below:
Correct answer · Option 2
Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
Explanation
Assertion is true because thermal agitation randomly orients permanent dipoles in polar substances. Reason is also a true factual statement about non-polar molecules, but it does not explain the Assertion.