1
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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]

A
4$$\pi$$ $$\times$$ 10$$-$$7
B
4$$\pi$$ $$\times$$ 10$$-$$4
C
4$$\pi$$ $$\times$$ 10$$-$$5
D
4$$\pi$$ $$\times$$ 10$$-$$6
2
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A bar magnet having a magnetic moment of 2.0 $$\times$$ 105 JT$$-$$1, is placed along the direction of uniform magnetic field of magnitude B = 14 $$\times$$ 10$$-$$5 T. The work done in rotating the magnet slowly through 60$$^\circ$$ from the direction of field is :

A
14 J
B
8.4 J
C
4 J
D
1.4 J
3
JEE Main 2022 (Online) 25th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.

Statement II : Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.

Choose the correct answer from the options given below :

A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
4
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has

A
low coercivity and high retentivity.
B
low coercivity and low permeability.
C
high permeability and low retentivity.
D
high permeability and high retentivity.
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