1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be
A
MB/F
B
BF/M
C
MF/B
D
F/MB
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A current loop in a magnetic field
A
can be in equilibrium in two orientations, both the equilibrium states are unstable.
B
can be in equilibrium in two orientations, one stable while the other is unstable.
C
experiences a torque whether the field is uniform or non uniform in all orientations.
D
can be in equilibrium in one orientation.
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

NEET 2013 Physics - Magnetism and Matter Question 31 English
A
$${2 \over \pi }M$$
B
$${M \over 2}$$
C
M
D
$${3 \over \pi }M$$
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
A magnetic needle suspended parallel to a magnetic field requires $$\sqrt 3 J$$ of work to turn it through 60o. The torque needed to maintain the needle in this position will be
A
$$2\sqrt 3 J$$
B
$$3$$ $$J$$
C
$$\sqrt 3 \,J$$
D
$${3 \over 2}\,J$$
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