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Q. No.Maxwell is a unit of:
1.
magnetic susceptibility.
2.
magnetic flux.
3.
magnetic permeability.
4.
magnetic dipole moment.
Subtopic: Magnetic Field & Field Lines |
77%
Level 2: 60%+
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A paramagnetic substance of susceptibility \(3{\times}10^{-4} \) is placed in a magnetic field of \(4\times{10}^{-4}~\text{A-m}^{-1}.\) The intensity of magnetization in the units of \(\text{A-m}^{-1}\) is:
1. \(1.33\times10^8\)
2. \(0.75\times10^{-8}\)
3. \(12\times10^{-8}\)
4. \(14\times10^{-8}\)
1. \(1.33\times10^8\)
2. \(0.75\times10^{-8}\)
3. \(12\times10^{-8}\)
4. \(14\times10^{-8}\)
Subtopic: Magnetization & Magnetic Intensity |
82%
Level 1: 80%+
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The magnetic lines of force inside a bar magnet:
| 1. | do not exist. |
| 2. | are from the N-pole to the S-pole of the magnet. |
| 3. | are from the S-pole to the N-pole of the magnet. |
| 4. | depend upon the area of the cross-section of the bar magnet |
Subtopic: Bar Magnet |
82%
Level 1: 80%+
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The ratio of the magnetic field due to a small bar magnet in the end-on position to that in its broad side-on position at equal distance from the magnet is:
1. \(1:4\)
2. \(1:2\)
3. \(1:1\)
4. \(2:1\)
1. \(1:4\)
2. \(1:2\)
3. \(1:1\)
4. \(2:1\)
Subtopic: Bar Magnet |
71%
Level 2: 60%+
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A short bar magnet of magnetic moment \(0.4~\text{JT}^{-1}\) is placed in a uniform magnetic field of \(0.16~\text{T}\). The magnet is in stable equilibrium when the potential energy is:
1. \(0.064~\text{J}\)
2. \(-0.064~\text{J}\)
3. zero
4. \(-0.082~\text{J}\)
1. \(0.064~\text{J}\)
2. \(-0.064~\text{J}\)
3. zero
4. \(-0.082~\text{J}\)
Subtopic: Analogy between Electrostatics & Magnetostatics |
85%
Level 1: 80%+
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The magnetic moment of a diamagnetic atom is:
| 1. | much greater than one |
| 2. | one |
| 3. | between zero and one |
| 4. | equal to zero |
Subtopic: Magnetic Materials |
73%
Level 2: 60%+
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Correct relation between magnetic field \(B,\) magnetic intensity \(H,\) and intensity of magnetization \(I\) is:
1. \( B=\mu_{0}\left(H+I\right)\)
2. \(I=\mu_0\left(H+B\right)\)
3. \(H=\mu_0\left(I+B\right)\)
4. \(B=2H\left(I+\mu_0\right)\)
1. \( B=\mu_{0}\left(H+I\right)\)
2. \(I=\mu_0\left(H+B\right)\)
3. \(H=\mu_0\left(I+B\right)\)
4. \(B=2H\left(I+\mu_0\right)\)
Subtopic: Magnetization & Magnetic Intensity |
88%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | A disc-shaped magnet is levitated above a superconducting material that has been cooled by liquid nitrogen. |
| Reason (R): | Superconductors repel a magnet. |
| 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. | Both (A) and (R) are False. |
Subtopic: Magnetic Materials |
75%
Level 2: 60%+
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Given below are two statements:
| Statement I: | The poles of magnets cannot be separated by breaking into two pieces. |
| Statement II: | The magnetic moment will be reduced to half when a magnet is broken into two equal pieces. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Bar Magnet |
76%
Level 2: 60%+
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For a ferromagnetic material, the susceptibility is:
| 1. | Large and negative | 2. | Large and positive |
| 3. | Small and positive | 4. | Small and negative |
Subtopic: Magnetic Materials |
87%
Level 1: 80%+
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