(i) What is meant by a paramagnetic substance? State Curie’s law.
(ii) What is the value of magnetic susceptibility of Aluminium of its relative permeability is 1.000022?
How much force per unit length acts on a long current carrying conductor X due to a current flowing through another similar conductor Y, kept parallel to it in vacuum ?
Use this equation to define an Ampere, the fundamental unit of current.
where is the current in X.
i2 is the current in Y.
R is the distance between them.
Definition of Ampere: One ampere is the current which when flowing in each of the two infinitely long parallel conductors 1m apart in vacuum produces between them a force of exactly 2 x 10-7 N/m of length.
(i) Arrange all the seven types of electro-magnetic radiations in increasing order of their frequencies. (You must begin with a radiation with lowest frequency and end with the one having the highest frequency.)
(ii) State how electric vector E, magnetic vector B and velocity vector C are oriented in an electromagnetic wave.