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Q. No.Select the correct option based on the statements:
Statement I:
The magnetic field of a circular loop at very far away point on the axial line varies with distance as like that of a magnetic dipole.
Statement II:
The magnetic field due to magnetic dipole varies inversely with the square of the distance from the centre on the axial line.
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: Analogy between Electrostatics & Magnetostatics |
57%
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NEET - 2022
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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: Magnetization & Magnetic Intensity |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | Magnetic susceptibility is a pure number. |
| Reason (R): | The value of magnetic susceptibility for vacuum is one. |
| 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 |
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If a magnetic monopole were to exist, what would be appropriate units of its ‘strength’?
1. \(\text{Wb}/\text{T}\)
2. \(\text{T}/\text{m}^3\)
3. \(\text{C.m}/\text{s}\)
4. \(\text{D}/\text{T}\)
1. \(\text{Wb}/\text{T}\)
2. \(\text{T}/\text{m}^3\)
3. \(\text{C.m}/\text{s}\)
4. \(\text{D}/\text{T}\)
Subtopic: Analogy between Electrostatics & Magnetostatics |
From NCERT
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Given below are two statements:
| Statement I: | All paramagnetic substances become diamagnetic as their temperature is lowered. |
| Statement II: | All ferromagnetic substances become paramagnetic when their temperature is lowered. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
60%
From NCERT
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A bar magnet having a magnetic moment of \(2.0\times10^{5}~\text{JT}^{-1}\) is placed along the direction of the uniform magnetic field of magnitude, \(B=14\times10^{-5}~\text{T}\). The work done in rotating the magnet slowly through \(60^\circ \) from the direction of the field is:
1. \(14~\text{J}\)
2. \(8.4~\text{J}\)
3. \(4~\text{J}\)
4. \(1.4~\text{J}\)
1. \(14~\text{J}\)
2. \(8.4~\text{J}\)
3. \(4~\text{J}\)
4. \(1.4~\text{J}\)
Subtopic: Bar Magnet |
92%
From NCERT
JEE
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The susceptibility of a paramagnetic material is \(99.\) The permeability of the material in Wb/A-m is:
(Permeability of free space, \(\mu_{0}=4\pi \times 10^{-7}\) Wb/A-m )
1. \(4 \pi \times 10^{-7} \)
2. \( 4 \pi \times 10^{-4} \)
3. \( 4 \pi \times 10^{-5} \)
4. \( 4 \pi \times 10^{-6}\)
(Permeability of free space, \(\mu_{0}=4\pi \times 10^{-7}\) Wb/A-m )
1. \(4 \pi \times 10^{-7} \)
2. \( 4 \pi \times 10^{-4} \)
3. \( 4 \pi \times 10^{-5} \)
4. \( 4 \pi \times 10^{-6}\)
Subtopic: Magnetic Materials |
87%
From NCERT
JEE
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The universal property of all substances is:
| 1. | diamagnetism only |
| 2. | ferromagnetism only |
| 3. | paramagnetism only |
| 4. | both paramagnetism and diamagnetism |
Subtopic: Magnetic Materials |
70%
From NCERT
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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. | \(1.5~\text{A}\) |
Subtopic: Magnetization & Magnetic Intensity |
70%
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If the work done in turning a magnet of magnetic moment \(M\) by an angle of \(90^\circ\) from magnetic meridian is \(n\) times the corresponding work done to turn it through an angle of \(60^\circ,\) then the value of \(n\) is:
1. \(1\over 2\)
2. \(2\)
3. \(\sqrt 3\over 2\)
4. \(2\over \sqrt 3\)
1. \(1\over 2\)
2. \(2\)
3. \(\sqrt 3\over 2\)
4. \(2\over \sqrt 3\)
Subtopic: Analogy between Electrostatics & Magnetostatics |
74%
From NCERT
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