JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Analyzing +4 | -1

Which of the following do not have the same dimensional formula as the velocity?
Given that

\mathrm{m}_0=

permeability of free space,

\mathrm{e}_0=

permittivity of free space,

\mathrm{n}

= frequency,

l

= wavelength,

\mathrm{P}=

pressure,

\mathrm{r}

=

density,

\mathrm{w}=

angular frequency,

\mathrm{k}=

wave number

View answer and explanation

Correct option: D

\omega \mathrm{k}

Option D (

\omega k

) is correct because its dimensional formula is [L⁻¹T⁻¹], which is different from the velocity's [LT⁻¹].

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