Magnetic Effects of Current Test 03 Class 12 Notes | EduRev

Class 12 : Magnetic Effects of Current Test 03 Class 12 Notes | EduRev

 Page 1


CBSE TEST PAPER-03 
CLASS - XII PHYSICS (Magnetic effects of current and magnetism) 
1. How does the intensity of magnetization of a paramagnetic material vary with
increasing applied magnetic field?
[1] 
2. An iron bar magnet is heated to 1000
0
C and then cooled in a magnetic field free
space. Will it retain magnetism?
[1] 
3. Two wires loops PQRSP formed by joining
two semicircular wires of radii R 1 and R 2
carries a current I as shown in the figure.
What is the magnetic of the magnetic
induction at the centre C.?
[1] 
4. What is the magnetic moment associated with a coil of 1 turns, area of cross- 
section     10
-4
m
2
 carrying a current of 2A?
[1] 
5. A circular coil is placed in uniform magnetic field of strength 0.10T normal to the
plane of coil. If current in the coil is 5.0A. Find.
(a) Total torque on the coil 
(b) Total force on the coil 
(c) Average force on each electron due to magnetic field 
(The coil is made of copper wire of cross- sectional area 10
-5
 m
2
 and free 
electron density in copper is 10
29
 m
-3
) 
[1] 
6. A particle of mass m and charge q moving with a uniform speed ? normal to a
uniform magnetic field B describes a circular path of radius & Derive
expressions for (1) Radius of the circular path (2) time period of revolution (3)
Kinetic energy of the particle?
[1] 
7. Using Ampere’s circuital law, derive an expression for magnetic field along the
axis of a Toroidal solenoid?
[1] 
8. Write an expression for the force experienced by the charged particle moving in
a uniform magnetic field B With the help of labeled diagram explain the working
of cyclotron? Show that cyclotron frequency does not depend upon the speed of
the particle?
[1] 
I
I
S R
Q P
C
R
1
R
2
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