NEET 2016 Question Paper - Phase-I Code B Q X - Mock Test

A siren emitting a sound of frequency $800\text{Hz}$ moves away from an observer towards a cliff at a speed of $15{\text{ms}}^{-1}$. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is: (Take velocity of sound in air $=330{\text{ms}}^{-1}$)

A body of mass $1\text{kg}$ begins to move under the action of a time dependent force $\vec{F}=(2t\hat{i}+3t^2\hat{j})\text{N}$, where $\hat{i}$ and $\hat{j}$ are unit vectors along $x$ and $y$ axis. What power will be developed by the force at the time $t$?

From a disc of radius $R$ and mass $M$, a circular hole of diameter $R$, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

In a diffraction pattern due to a single slit of width $a$, the first minimum is observed at an angle $30^{\circ }$ when light of wavelength $5000\text{A˚}$ is incident on the slit. The first secondary maximum is observed at an angle of:

A square loop $ABCD$ carrying a current $i$, is placed near and coplanar with a long straight conductor $XY$ carrying a current $I$. The net force on the loop will be: