AIEEE 2005 Physics Question Paper Mock Test

A particle of mass $10\text{ g}$ is kept on the surface of a uniform sphere of mass $100\text{ kg}$ and radius $10\text{ cm}$. Find the work to be done against the gravitational force between them to take the particle far away from the sphere [$G=6.67\times 10^{-11}{\text{ Nm}}^2/{\text{kg}}^2$ ]:

A gaseous mixture consists of $16\text{ g}$ of helium and $16\text{ g}$ of oxygen. The ratio $C_P/C_V$ of the mixture is:

The intensity of gamma radiation from a given source is $I$. On passing through $36\text{ mm}$ of lead, it is reduced to $I/8$. The thickness of lead which will reduce the intensity to $I/2$ will be:

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than $2480\text{ nm}$ is incident on it. The band gap in ($\text{eV}$) for the semiconductor is:

A photocell is illuminated by a small bright source placed $1\text{ m}$ away. When the same source of light is placed $1/2\text{ m}$ away, the number of electrons emitted by photo cathode would: