Choose the correct statement regarding magnetism.

1. Paramagnetic sample displays greater magnetization when cooled.
2. Diamagnetism is almost independent of temperature.
3. Ferromagnetic substances show hysteresis.
4. All of these.

Subtopic:  Magnetic Materials |
 91%
From NCERT
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There are four light-weight-rod samples; A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted:

i. A is feebly repelled 
ii.  B is feebly attracted
iii.  C is strongly attracted
iv. D remains unaffected

Which one of the following is true?

1. C is of a diamagnetic material
2. D is of a ferromagnetic material
3. A is of a non-magnetic material
4. B is of a paramagnetic material

Subtopic:  Magnetic Materials |
 88%
From NCERT
NEET - 2011
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If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is:

1. repelled by both the poles
2. repelled by the north pole and attracted by the south pole
3. attracted by the north pole and repelled by the south pole
4. attracted by both the poles
Subtopic:  Magnetic Materials |
 86%
From NCERT
NEET - 2009
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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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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 |
 81%
From NCERT
AIPMT - 2003
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The material which is used to make permanent magnet has:

1. High retentivity, low coercivity
2. Low retentivity, low coercivity
3. Low retentivity, high coercivity
4. High retentivity, high coercivity

Subtopic:  Magnetic Materials |
 74%
From NCERT
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The possible value of magnetic susceptibility of a diamagnetic material can be:

1. -2.45

2. 0.75

3. -0.5

4. 1.67

Subtopic:  Magnetic Materials |
 71%
From NCERT
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The magnetic susceptibility χ of a diamagnetic material depends on absolute temperature T as:

1. χ   T 
2. χ  1T
3. χ   T0 
4. χ  1T

Subtopic:  Magnetic Materials |
 72%
From NCERT
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The variation of the intensity of magnetisation (I) with respect to the magnetising field (H) in a diamagnetic substance is described by the graph:

 

1. OD 2. OC
3. OB 4. OA
Subtopic:  Magnetic Materials |
 70%
From NCERT
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Select the incorrect statement regarding magnetic material.

1. The magnetic dipole moment of each atom of para and ferromagnetic substance is zero and that of diamagnetic material is non-zero in the absence of external magnetizing force
2. When the diamagnetic substance is brought near the north or south pole of a bar magnet, it is repelled
3. Magnetic susceptibility of diamagnetic substances is temperature independent and that of para and ferromagnetic substances is temperature-dependent
4. All of these
Subtopic:  Magnetic Materials |
 73%
From NCERT
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