# 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%
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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
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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 $\left(\chi \right)$ 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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