NEET 2018 Question Paper Mock Test

A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy ($K_t$) as well as rotational kinetic energy ($K_r$) simultaneously. The ratio $K_t:(K_t+K_r)$ for the sphere is:

A small sphere of radius '$r$ ' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to:

The power radiated by a black body is $P$ and it radiates maximum energy at wavelength, ${\lambda }_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\frac{3{\lambda }_0}{4}$, the power radiated by it becomes $nP$. The value of $n$ is:

Two wires are made of the same material and have the same volume. The first wire has cross-sectional area $A$ and the second wire has cross-sectional area $3A$. If the length of the first wire is increased by $\Delta l$ on applying a force $F$, how much force is needed to stretch the second wire by the same amount?

A sample of $0.1\text{g}$ of water at $100^{\circ }\text{C}$ and normal pressure ($1.013\times 10^5{\text{Nm}}^{-2}$) requires $54\text{cal}$ of heat energy to convert to steam at $100^{\circ }\text{C}$. If the volume of the steam produced is $167.1\text{cc}$, the change in internal energy of the sample, is: