AIEEE 2004 (Physics) Mock Test

The temperature of two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity $K$ and $2K$ and thickness $x$ and $4x$ respectively, are $T_2$ and $T_1$ ($T_2>T_1$). The rate of heat transfer through the slab in a steady state is $\frac{A(T_2-T_1)K}{x}f$, where $f$ is:

A light ray is incident perpendicular to one face of a $90^{\circ }$ prism and is totally internally reflected at the glass-air interface. If the angle of reflection is $45^{\circ }$, we conclude that the refractive index $n$ is:

A plano-convex lens of refractive index $1.5$ and radius of curvature $30\text{cm}$ is silvered at the curved surface. At what distance from this lens should an object be placed in order to have a real image of the same size as the object?

The angle of incidence at which reflected light is totally polarized for reflection from air to glass (refractive index $n$), is:

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young’s double-slit experiment is: