Units & Dimensions

JEE Main level, single correct, medium

146 of 149

Question 146 of 149

The physical quantities not having same dimensions are

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Answer: (B) momentum and Planck's constant

[[ momentum ]=[M][L][T−1]=[MLT−1]]=[\mathrm{M}][\mathrm{L}]\left[\mathrm{T}^{-1}\right]=\left[\mathrm{MLT}^{-1}\right]
(Planck's Constant)
=Eu=[M][LT−1]2 T−1=ML2 T−1=\frac{E}{\mathrm{u}}=\frac{[\mathrm{M}]\left[\mathrm{LT}^{-1}\right]^2}{\mathrm{~T}^{-1}}=\mathrm{ML}^2 \mathrm{~T}^{-1}

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