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, 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: Magnetization & Magnetic Intensity |
84%
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 |
87%
From NCERT
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Subtopic: Magnetization & Magnetic Intensity |
83%
From NCERT
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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: Magnetization & Magnetic Intensity |
82%
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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 |
81%
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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The magnetic moment of a magnet \((10 ~cm\times 4~cm\times1~cm)\) is \(4 ~Am^2\). Its intensity of magnetisation is:
1. 103 A/m
2. 102 A/m
3. 105 A/m
4. 104 A/m
Subtopic: Magnetization & Magnetic Intensity |
78%
From NCERT
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The coercivity of a small magnet when the ferromagnet gets demagnetised is \(3\times 10^{3}~\text{Am}^{-1}\). The current required to be passed in a solenoid coil of length \(10~\text{cm}\) and the number of turns \(100,\) so that the magnet gets completely demagnetised when placed inside the solenoid is:
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: Magnetization & Magnetic Intensity |
76%
From NCERT
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Relation between permeability \(\mu\) and magnetising field \(H\) for a sample of iron is \(\mu=({0.5\over H}+8\times 10^{-4})\) henry per metre, where unit of \(H\) is A/m. What would be the value of \(H\) for which magnetic induction of \(1.0\) Wb/m2 can be produced?
1. \(500\) A/m
2. \(0.625\) A/m
3. \(625\) A/m
4. \(5.25\) A/m
1. \(500\) A/m
2. \(0.625\) A/m
3. \(625\) A/m
4. \(5.25\) A/m
Subtopic: Magnetization & Magnetic Intensity |
66%
From NCERT
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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 |
62%
From NCERT
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