QJEEM21Phbc93: JEE Main 2021 Physics - Class 11 JEEM21Phbc93 Solution: Which of the following is not a dimensionless quantity?

Question

Verified Solution • 2025–26 Session moderate

Which of the following is not a dimensionless quantity?

Accepted Answer

[

\mu

_r] = 1 as

\mu

_r =

{\mu \over {{\mu _m}}}

[power factor (cos

\phi

)] = 1

{\mu _0} = {{{B_0}} \over H}

(unit = NA^{$-$ 2}) : Not dimensionless

[

\mu

₀] = [MLT^{$-$ 2}A^{$-$ 2}]

quality factor

(Q) = {{Energy\,stored} \over {Energy\,dissipated\,per\,cycle}}

So Q is unitless & dimensionless.

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