Physics · Units, Dimensions & Error Analysis

NEET (UG) 2024 — Question 12

The quantities which have the same dimensions as those of solid angle are:

Answer: A

Solid angle $d \Omega=\frac{d A}{r^{2}}$ has dimensions $\left[M^{0} L^{0} T^{0}\right]$

Strain $=\frac{\Delta l}{l}$ has dimensions [ $\left.M^{0} L^{0} \top^{0}\right]$

Angle measured in radians is also dimensionless $\left[M^{0} L^{0} T^{0}\right]$

$\theta=\frac{l}{r}$

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