1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle
A
depends on R and not on v
B
is independent of both v and R
C
depends on both v and R
D
depends on v and not on R
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
A
repelled by the north pole and attracted by the south pole
B
attracted by the north pole and repelled by the south pole
C
attracted by both the poles
D
repelled by both the poles
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A bar magnet having a magnetic moment of 2 $$ \times $$ 104 J T$$-$$1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 $$ \times $$ 10$$-$$4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60o from the field is
A
12 J
B
6 J
C
2 J
D
0.6 J
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity. $$\overrightarrow V = v\widehat i$$. The magnetic field is directed along the negative z axis direction. The induced emf, during the passes of these loops, out of the field region, will not remain constant for
A
The circular and the elliptical loops
B
only the ellliptical loop
C
any of the four loops
D
the rectangular, circular and elliptical loops
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