Embibe Experts Solutions for Chapter: Physical World and Measurement, Exercise 1: NEET - 13th September 2020

Plane angle and solid angle have:

Match List - I with List - II :

Choose the correct answer from the options given below:

The area of a rectangular field (in ${\mathrm{m}}^2$) of length $55.3 \mathrm{m}$ and breadth $25 \mathrm{m}$ after rounding off the value for correct significant digits is:

If $E$ and $G$ respectively denote energy and gravitational constant, then $\frac{E}{G}$ has the dimensions of:

A screw gauge gives the following readings when used to measure the diameter of a wire
Main scale reading : $0 \mathrm{mm}$
Circular scale reading : $52 \mathrm{divisions}$
Given that $1 \mathrm{mm}$ on main scale corresponds to $100 \mathrm{divisions}$ on the circular scale. The diameter of the wire from the above data is:

If force $\left[F\right]$, acceleration $\left[A\right]$ and time $\left[T\right]$ are chosen as the fundamental physical quantities. Find the dimensions of energy.

A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the

Time intervals measured by a clock give the following readings: $1.25 \mathrm{s}, 1.24 \mathrm{s}, 1.27 \mathrm{s}, 1.21 \mathrm{s}$ and $1.28 \mathrm{s}$. What is the percentage relative error of the observations?