A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 0.2 weber/m2. The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 30o with the direction of the field, the torque required to keep the coil in stable equilibrium will be
A
0.24 Nm
B
0.12 Nm
C
0.15 Nm
D
0.20 Nm
2
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment $$\overrightarrow m .$$ Which configuration has highest net magnetic dipole moment ?
A
(1)
B
(2)
C
(3)
D
(4)
3
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
4
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.
