The net magnetic flux through any closed surface is:
1. negative
2. zero
3. positive
4. infinity
 
Subtopic:  Analogy between Electrostatics & Magnetostatics |
 80%
From NCERT
NEET - 2023
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The variation of susceptibility \((\chi)\) with absolute temperature \((T)\) for a paramagnetic material is represented as:
1. 2.
3. 4.
Subtopic:  Curie's Law and Hysteresis (OLD NCERT) |
 52%
From NCERT
NEET - 2023
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Given below are two statements:
Assertion (A): Gauss's law for magnetism states that the net magnetic flux through any closed surface is zero.
Reason (R): The magnetic monopoles do not exist. North and South poles occur in pairs, allowing vanishing net magnetic flux through the surface.
 
1. (A) is true but (R) is false.
2. (A) is false but (R) is true.
3. Both (A) and (R) are true and (R) is the correct explanation of (A).
4. Both (A) and (R) are true but (R) is not the correct explanation of (A).

Subtopic:  Analogy between Electrostatics & Magnetostatics |
 71%
From NCERT
NEET - 2022
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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 |
 54%
From NCERT
NEET - 2022
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An iron rod of susceptibility \(599\) is subjected to a magnetising field of \(1200~\text{A m}^{-1}\).  The permeability of the material of the rod is:\(\left(\mu_0 = 4 \pi\times 10^{-7}~\text{T m A}^{-1}\right)\)
1. \(8.0\times 10^{-5}~\text{T m A}^{-1}\)
2. \(2.4\pi\times 10^{-5}~\text{T m A}^{-1}\)
3. \(2.4\pi\times 10^{-7}~\text{T m A}^{-1}\)
4. \(2.4\pi\times 10^{-4}~\text{T m A}^{-1}\)

Subtopic:  Magnetization & Magnetic Intensity |
 62%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from:

1. the current source
2. the magnetic field
3. the lattice structure of the material of the rod
4. the induced electric field due to the changing magnetic field.
Subtopic:  Magnetic Materials |
From NCERT
NEET - 2018
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A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in the equilibrium state. The energy required to rotate it by \(60^{\circ}\) is \(W\). Now the torque required to keep the magnet in this new position is:
1. \(\frac{W}{\sqrt{3}}\)
2. \(\sqrt{3}W\)
3. \(\frac{\sqrt{3}W}{2}\)
4. \(\frac{2W}{\sqrt{3}}\)

Subtopic:  Analogy between Electrostatics & Magnetostatics |
 77%
From NCERT
NEET - 2016
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The magnetic susceptibility is negative for:
 
1. paramagnetic material only
2. ferromagnetic material only
3. paramagnetic and ferromagnetic materials
4. diamagnetic material only
Subtopic:  Magnetic Materials |
 87%
From NCERT
NEET - 2016
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The following figures show the arrangement of bar magnets in different configurations. Each magnet has a magnetic dipole. Which configuration has the highest net magnetic dipole moment?

1. 2.
3. 4.
Subtopic:  Bar Magnet |
 70%
From NCERT
AIPMT - 2014
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A bar magnet of length \(‘l’\) and magnetic dipole moment \(‘M’\) is bent in the form of an arc as shown in the figure. The new magnetic dipole moment will be:

1. \(\frac{3M}{\pi}\) 2. \(\frac{2M}{l\pi}\)
3. \(\frac{M}{ 2}\) 4. \(M\)
Subtopic:  Bar Magnet |
 77%
From NCERT
AIPMT - 2013
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