Find out from table ,the medium having highest optical density. Also find the medium with lowest optical density.

The six faces of a die are marked with the numbers 2,3,5,7,11 and 13 respectively. Mention all the probable simple events obtained from a trial of tossing the die and find their probabilities. Also find the probaliilities of the events of (iii) getting a prime number

Given that the velocity of sound in a medium depends on the modulus of elasticity and the density of the medium, find an expression for velocity of sound by dimensional analysis.

Define / give meaning of the following Optically denser medium

A rectangular coil carrying current is placed in a uniform magnetic field in such a way that normal to the coil makes an angle theta with the direction of magnetic flux density. Find the magnitude of torque acting on the coil Define magnetic moment of a current loop.