# Two bar magnets having the same geometry with magnetic moments M and 2M are firstly placed in such a way that if their similar poles are on the same side then their time period of oscillation is T1. Now if the polarity of one of the magnets is reversed then the time period of oscillation is T2. The relation between T1 & T2 is: 1. ${\mathrm{T}}_{1}<{\mathrm{T}}_{2}$ 2. ${\mathrm{T}}_{1}={\mathrm{T}}_{2}$ 3. ${\mathrm{T}}_{1}>{\mathrm{T}}_{2}$ 4. ${\mathrm{T}}_{2}=\infty$

Subtopic:  Bar Magnet |
67%
From NCERT
AIPMT - 2002
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Among which of the following the magnetic susceptibility does not depend on the temperature:
1. Diamagnetism
2. Paramagnetism
3. Ferromagnetism
4. Ferrite

Subtopic:  Magnetic Materials |
86%
From NCERT
AIPMT - 2001
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A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled:

 1 motion remains S.H.M. with time period = T/2 2 motion remains S.H.M. with time period = 2T 3 motion remains S.H.M. with time period = 4T 4 motion remains S.H.M. with time and period remains nearly constant
Subtopic:  Bar Magnet |
67%
From NCERT
AIPMT - 2003
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Diamagnetic material in a magnetic field moves:

 1 from stronger to the weaker parts of the field 2 from weaker to the stronger parts of the field 3 perpendicular to the field 4 in none of the above directions

Subtopic:  Magnetic Materials |
80%
From NCERT
AIPMT - 2003
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For a vibration magnetometer, the time period of the suspended bar magnet can be reduced by:

1.  moving it towards the south pole
2.  moving it towards the north pole
3.  moving it towards the equator
4.  anyone of them

Subtopic:  Bar Magnet |
64%
From NCERT
AIPMT - 1999
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If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by µd, µp, and µf respectively, then:

1. µp = 0 and µf ≠ 0

2. µd ≠ 0 and µp = 0

3. µd ≠ 0 and µf ≠ 0

4. µd = 0 and µp ≠ 0

Subtopic:  Magnetic Materials |
79%
From NCERT
AIPMT - 2005
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For protecting a magnetic needle, it should be placed:

 1 In an iron box. 2 In a wooden box. 3 In a metallic box. 4 None of these.

Subtopic:  Magnetic Materials |
From NCERT
AIPMT - 1998
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