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 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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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 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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A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as:

1. Paramagnetic  2. Diamagnetic
3. Ferromagnetic  4. None of these
Subtopic:  Magnetic Materials |
 67%
From NCERT
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The variation of magnetic susceptibility (χ) with temperature for a diamagnetic substance is best represented by:

1.  2.
3. 4.
Subtopic:  Magnetic Materials |
 66%
From NCERT
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