IMSU Physics 2012/2013 Past Questions

Energy losses through eddy currents are reduced by using

An electron of charge 1.6 x 10^-19 C and mass 9.1 x 10^-31 kg is accelerated between two metal plates with a velocity of 4x10⁷ ms^-1, the potential difference between the plates is

The atmospheric molecule that protects the earth from direct heat of the sun

The phenomenon observed when dust particles collide randomly in a beam of sunlight is known as

If an object is placed between two parallel plane mirrors with their reflecting surfaces facing each other, how many images of the object will be formed?

By what factor will the size of an object placed 10cm from a convex lens be increased if the, image is seen on a screen placed 25cm from the lens?

At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity?

A ray incident on a glass prism undergoes minimum deviation when the

Which of the following pairs of light rays show the widest separation in the spectrum of white light?

A ray of light is incident on an equilateral triangular prism of refractive index 3/2. Calculate the angle through which the ray is minimally deviated in the prism

The operation of an optical fibre is based on the principle of

Coin placed below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is