Due to a small magnet, the intensity at a distance \(x\) in the end-on position is \(9~\text{gauss}\). What will be the intensity at a distance \(\frac{x}{2}\) on equatorial position?
1. \(9~\text{gauss}\)
2. \(4~\text{gauss}\)
3. \(36~\text{gauss}\)
4. \(4.5~\text{gauss}\)

Subtopic:  Bar Magnet |
 74%
From NCERT
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The magnetization of a piece of iron or steel:

1. depends on the strength of the magnetizing field.
2. depends on external conditions such as temperature.
3. cannot be done beyond the saturation point.
4. all of these.

Subtopic:  Magnetization & Magnetic Intensity |
 88%
From NCERT
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A Gaussian surface is drawn enclosing the N-pole of a bar magnet. The net magnetic flux through the Gaussian surface will be:
(pole strength of N-pole is treated as positive and S-pole as negative)

   

1. positive.
2. negative.
3. positive or negative.
4. zero.

Subtopic:  Bar Magnet |
 65%
From NCERT
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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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The magnetic moment of a magnet \((10 ~cm\times 4~cm\times1~cm)\) is \(4 ~Am^2\). Its intensity of magnetisation is:

1. 10A/m

2. 10A/m

3. 10A/m

4. 10A/m

Subtopic:  Magnetization & Magnetic Intensity |
 78%
From NCERT
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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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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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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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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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A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by:

1.  2.
3. 4.
Subtopic:  Magnetization & Magnetic Intensity |
 81%
From NCERT
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