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 |
 87%
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When a magnetic material is subjected to a very small magnetising force \(H,\) the intensity of magnetisation is proportional to:

1. \(\frac{1}{\sqrt{H}} \) 2. \(\sqrt{H} \)
3. \(H \) 4. \(H^2\)
Subtopic:  Magnetization & Magnetic Intensity |
 82%
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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%
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The magnetic moment of a magnet \((10 ~\text{cm}\times 4~\text{cm}\times1~\text{cm})\) is \(4 ~\text{Am}^2\). Its intensity of magnetisation is:
1. \(10^{3}\) A/m
2. \(10^{2}\) A/m
3. \(10^{5}\) A/m
4. \(10^{4}\) A/m

Subtopic:  Magnetization & Magnetic Intensity |
 78%
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S.I. unit of intensity of magnetization is:

1. Ampere-metre 2. Ampere-metre2
3. Ampere/metre 4. Ampere/metre2
Subtopic:  Magnetization & Magnetic Intensity |
 63%
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The magnetic dipoles in a diamagnetic material are represented, for three situations. The three situations differ in magnitude if a magnetic field is applied to the material. In which situation the magnetization of the material is the greatest:
            

1. \(A\) 2. \(B\)
3. \(C\) 4. Equal in \(A,B\) and \(C\)
Subtopic:  Magnetization & Magnetic Intensity |
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Which of the following is not dimensionless?
(where symbols stand for their usual meanings in magnetism)
1. \(\frac{I}{H}\)
2. \(\frac{B}{\mu_0H}\)
3. \(\mu_r\)
4. \(\frac{\mu_r B}{H}\)

Subtopic:  Magnetization & Magnetic Intensity |
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A bar magnet has coercivity \(4\times 10^{3}~\text{Am}^{-1}\). It is desired to demagnetize it by inserting it inside a solenoid \(12~\text{cm}\) long and having \(60\) turns. The current that should be sent through the solenoid is:
1. \(2\) A
2. \(4\) A
3. \(6\) A
4. \(8\) A

Subtopic:  Magnetization & Magnetic Intensity |
 54%
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