1
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The free space inside a current carrying toroid is filled with a material of susceptibility $$2 \times 10^{-2}$$. The percentage increase in the value of magnetic field inside the toroid will be

A
0.1%
B
1%
C
2%
D
0.2%
2
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time the magnet will

A
move down with almost constant speed
B
move down with an acceleration equal to $$\mathrm{g}$$
C
move down with an acceleration greater than $$\mathrm{g}$$
D
oscillate inside the tube
3
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I : For diamagnetic substance, $$-1 \leq \chi < 0$$, where $$\chi$$ is the magnetic susceptibility.

Statement II : Diamagnetic substances when placed in an external magnetic field, tend to move from stronger to weaker part of the field.

In the light of the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are true
B
Statement I is correct but Statement II is false
C
Both Statement I and Statement II are False
D
Statement I is incorrect but Statement II is true.
4
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A : Electromagnets are made of soft iron.

Reason R : Soft iron has high permeability and low retentivity.

In the light of above, statements, choose the most appropriate answer from the options given below.

A
Both A and R are correct and R is the correct explanation of A
B
A is not correct but R is correct
C
A is correct but R is not correct
D
Both A and R are correct but R is NOT the correct explanation of A
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