Assertion :The dielectric constant is a number without dimensions. Reason: Dielectric constant is a ratio.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Dielectric constant or relative permittivity is the materialistic property of any material. Relative permittivity or dielectric constant of a material is the ratio of permittivity of the material to the permittivity of free space,
$ε_{r} = \frac{ε}{ε_{0}}$
It is clear that dielectric constant s a number without dimensions and is a ratio.

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