NEET 2017 Question Paper - Code A Mock Test

A potentiometer is an accurate and versatile device to make electrical measurements of $E.M.F.$, because the method involves:

A gas mixture consists of $2$ moles of ${\text{O}}_2$ and $4$ moles of $\text{Ar}$ at temperature $T$. Neglecting all vibrational modes, the total internal energy of the system is:

Radioactive material '$A$ ' has decay constant '$8\lambda$ ' and material '$B$ ' has decay constant '$\lambda$ '. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material '$B$ ' to that of '$A$ ' will be $\frac{1}{e}$?

A $U$ tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of $10\text{mm}$ 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:

A $250$ -Turn rectangular coil of length $2.1\text{cm}$ and width $1.25\text{cm}$ carries a current of $85\mu \text{A}$ and subjected to a magnetic field of strength $0.85\text{T}$. Work done for rotating the coil by $180^{\circ }$ against the torque is: