NEET 2020 Exam Paper (180 Q) - Mock Test

A screw gauge has least count of $0.01\text{mm}$ and there are $50$ divisions in its circular scale. The pitch of the screw gauge is:

In a guitar, two strings $A$ and $B$ made of same material are slightly out of tune and produce beats of frequency $6\text{Hz}$. When tension in $B$ is slightly decreased, the beat frequency increases to $7\text{Hz}$. If the frequency of $A$ is $530\text{Hz}$, the original frequency of $B$ will be:

Two particles of mass $5\text{kg}$ and $10\text{kg}$ respectively are attached to the two ends of a rigid rod of length $1\text{m}$ with negligible mass. The centre of mass of the system from the $5\text{kg}$ particle is nearly at a distance of:

Find the torque about the origin when a force of $3\hat{j}\text{N}$ acts on a particle whose position vector is $2\hat{k}\text{m}$.

Light with an average flux of $20{\text{W/cm}}^2$ falls on a non-reflecting surface at normal incidence having surface area $20{\text{cm}}^2$. The energy received by the surface during time span of $1\text{minute}$ is: