NEET 2017 Question Paper - Code B - Mock Test

A U-tube is partially filled with water. Oil is poured into one side until it stands $10\text{mm}$ above the water level on the other side. Meanwhile the water rises by $65\text{mm}$ from its original level. The density of the oil is:

Consider a drop of rain water of mass $1\text{g}$ falling from a height of $1\text{km}$. It hits the ground with a speed of $50{\text{ms}}^{-1}$. The work done by (i) gravitational force and (ii) resistive force of air is: ($g=10{\text{ms}}^{-2}$)

The $x$ and $y$ coordinates of the particle at any time are $x=5t-2t^2$ and $y=10t$. The acceleration of the particle at $t=2\text{s}$ is:

A long solenoid has $2\times 10^4$ turns per meter. At the centre, a coil of $100$ turns and radius $0.01\text{m}$ is placed. The current in the solenoid reduces to $0\text{A}$ from $4\text{A}$ in $0.05\text{s}$. If the resistance of the coil is $10{\pi }^2\Omega$, the total charge flowing through the coil is:

A Carnot engine having an efficiency of $1/10$ as a heat engine, is used as a refrigerator. If the work done on the system is $10\text{J}$, the amount of energy absorbed from the reservoir at lower temperature is: