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1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
A magnetic needle is kept in a non-uniform magnetic field. It experiences :
A
neither a force nor a torque
B
a torque but not a force
C
a force but not a torque
D
a force and a torque
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Curie temperature is the temperature above which
A
a ferromagnetic material becomes paramagnetic
B
a paramagnetic material becomes diamagnetic
C
a ferromagnetic material becomes diamagnetic
D
a paramagnetic material becomes ferromagnetic
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is $$2s.$$ The magnet is cut along its length into three equal parts and these parts are then placed on each other with their like poles together. The time period of this combination will be
A
$$2\sqrt 3 \,s$$
B
$${2 \over 3}\,\,s$$
C
$$2\,s$$
D
$${2 \over {\sqrt 3 }}\,s$$
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The materials suitable for making electromagnets should have
A
high retentivity and low coercivity
B
low retentivity and low coercivity
C
high retentivity and high coercivity
D
low retentivity and high coercivity
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