Physics - Unit & Dimension Question with Solution | TestHub

PhysicsUnit & DimensionMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Which two of the following five physical parameters have the same dimensions?
(A) Energy density
(B) Refractive index
(C) Dielectric constant
(D) Young’s modulus
(E) Magnetic field

Options:

Answer:

Solution:

[Energy density] $= \frac{[Work d o n e]}{[Volume]}$

$= \frac{[{ML}^{2} T^{- 2}]}{[L^{3}]} = [{ML}^{- 1} T^{- 2}]$

[Young’s modulus] $= [\frac{F}{A} \times \frac{l}{Δ l}]$

$= \frac{[ML T^{- 2}]}{[L^{2}]} \frac{[L]}{[L]} = [{ML}^{- 1} T^{- 2}]$

Stream:NTA_ABHYASSubject:PhysicsTopic:Unit & DimensionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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