(i)
In closed circuit PQSP
I1>1 - 4I1 + 10I3 = 5 ...(1)
Applying Kirchoff s First law at pt. θ.
I3 = I1 + I2
Using the above value of I3 in equation (1)
I, + 4I 1, + 10(I1 + I2 ) = 4
151, + 10I2 = 4 ...(2)
In closed circuit RQSR
2I2 + 3I2+ 10a +I2) = 3-5
10I, + 15I2 = 3-5 -(3)
On Solving equation (2) and (3) we get
12 = 0-1 Amp., I1 = 0-2 Amp.,
13 = I, + I2
= 0-3 Amp
(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.
(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.