Embibe Experts Solutions for Chapter: Physical World and Measurement, Exercise 1: AP EAPCET 2018 (25-APR Shift-1)

Which among the following has dimensions of charge?

Assertion (A) : Energy per unit volume and angular momentum can be added dimensionally.

Reason (R) : Physical quantities having same dimensions can be added or subtracted.

The speed of ripples $\left(v\right)$ on water surface depends on surface tension $\left(\sigma \right)$, density $\left(\rho \right)$, and wavelength $\left(\lambda \right)$. Then the square of speed $\left(v\right)$ is proportional to

Which of the following is not a unit of time?

$N$ divisions on the main scale of a vernier calipers coincide with $\left(N+1\right)$ divisions of the vernier scale. If each division of main scale is $a$ units, then the least count of the calipers is

One angstrom $\left(\stackrel{\circ }{\mathrm{A}}\right)$ is equal to: