Measurement MCQs for NEET — Physics Questions with Answers

$1micron={10}^{-6}m={10}^{-4}cm$

Watt = Joule/sec=watt

$$\begin{gathered} Pressure=Force/Area \\ P=N/m^2 \\ =Pascal \end{gathered}$$

Angular acceleration $=\frac{\text{Angular velocity}}{\text{Time}}=\frac{rad}{{\sec }^2}$

Kg-m/sec is the unit of linear momentum

$c{t}^2$ must have dimensions of L

$\Rightarrow$c must have dimensions of $L/T^2$ i.e. $L{T}^{-2}$

Angular momentum = Distance X Mass X Velocity

                              = $\left[\mathrm{L}\right]\times \left[\mathrm{M}\right]\times \left[{\mathrm{LT}}^{-1}\right]$

                               = $\left[{\mathrm{ML}}^2{\mathrm{T}}^{-1}\right]$

                                 $$\begin{gathered} = \left[{\mathrm{ML}}^2{\mathrm{T}}^{-2 }\right]X \left[\mathrm{T}\right] \\ =Joule X sec \end{gathered}$$

The unit of energy in SI system is Joule.

$6\times {10}^{-5}=60\times {10}^{-6}=60microns$