Q. No.Given below are two statements:
| Assertion (A): | Susceptibility is defined as the ratio of intensity of magnetization \(I\) to magnetic intensity \(H\). |
| Reason (R): | Greater the value of susceptibility, the smaller the value of the intensity of magnetization \(I\). |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Magnetization & Magnetic Intensity |
 88%
Level 1: 80%+
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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: Â Magnetization & Magnetic Intensity |
 88%
Level 1: 80%+
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Subtopic: Â Magnetization & Magnetic Intensity |
 84%
Level 1: 80%+
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There are two materials \(A\) and \(B\). The material \(B\) have high coercivity and \(A\) have low coercivity. The hysteresis loop area of material \(A\) is lesser than the material \(B\). Then:
| 1. | material \(A\) is preferred for making electromagnets. |
| 2. | material \(B\) is preferred for making permanent magnets. |
| 3. | material \(A\) is preferred for using electric generators and transformers. |
| 4. | all of these. |
Subtopic: Â Magnetization & Magnetic Intensity |
 83%
Level 1: 80%+
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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: Â Magnetization & Magnetic Intensity |
 84%
Level 1: 80%+
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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: Â Magnetization & Magnetic Intensity |
 83%
Level 1: 80%+
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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. \(10^{3}~\text{A/m}\)
2. \(10^{2}~\text{A/m}\)
3. \(10^{5}~\text{A/m}\)
4. \(10^{4}~\text{A/m}\)
Subtopic: Â Magnetization & Magnetic Intensity |
 80%
Level 1: 80%+
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When a small ferromagnetic magnet is fully demagnetized, its coercivity is measured to be \(3\times 10^{3}~\text{Am}^{-1}. \) A solenoid of length \(10~\text{cm},\) consisting of \(100\) turns, is used to achieve this demagnetization. What should be the current flowing through the solenoid to completely demagnetize the magnet when placed inside it?
1. \(6~\text{A}\)
2. \(30~\text{mA}\)
3. \(3~\text{A}\)
4. \(1.5~\text{A}\)
1. \(6~\text{A}\)
2. \(30~\text{mA}\)
3. \(3~\text{A}\)
4. \(1.5~\text{A}\)
Subtopic: Â Magnetization & Magnetic Intensity |
 71%
Level 2: 60%+
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The relationship between permeability \(\mu\) and the magnetising field \(H\) for a sample of iron is given by \(\mu=\left(\dfrac{0.5}{H}+8\times10^{-4} \right)\text{ henry per metre},\) where \(H\) is measured in \(\text{A/m}.\) What value of \(H\) is required to produce a magnetic induction of \(1.0\text{ Wb/m}^2 \text{?}\)
| 1. | \(500\text{ A/m}\) | 2. | \(0.625\text{ A/m}\) |
| 3. | \(625\text{ A/m}\) | 4. | \(5.25\text{ A/m}\) |
Subtopic: Â Magnetization & Magnetic Intensity |
 67%
Level 2: 60%+
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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: Â Magnetization & Magnetic Intensity |
 66%
Level 2: 60%+
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