Magnetism and Matter Practice Questions
JEE · Physics · 1466 free MCQs with instant results and detailed explanations.
1466
Total
329
Easy
653
Medium
484
Hard
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Topics in Magnetism and Matter
Earth's Magnetism
368
Magnetic Properties of Materials
378
Diamagnetism Paramagnetism Ferromagnetism
391
Bar Magnet
329
Sample Questions from Magnetism and Matter
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
If a bar magnet is placed in a uniform magnetic field, where will the north pole point?
A.
Towards the magnetic field source
B.
Away from the magnetic field source
C.
At an angle of 45 degrees to the field
D.
It will not align
Show Answer & Explanation
Correct Answer: A
The north pole of a magnet always points in the direction of the magnetic field lines, which indicates the direction of the magnetic field.
Q2
Easy
A bar magnet is cut into two equal halves. How does the magnetic moment of each half compare to the original magnet?
A.
It remains the same
B.
It doubles
C.
It halves
D.
It becomes zero
Show Answer & Explanation
Correct Answer: C
When a bar magnet is cut into two equal halves, each half retains half of the original magnetic moment, hence it becomes half.
Q3
Easy
What is the direction of the magnetic field inside a bar magnet?
A.
From south to north
B.
From north to south
C.
Always zero
D.
Perpendicular to the axis
Show Answer & Explanation
Correct Answer: A
The magnetic field lines inside a bar magnet run from the south pole to the north pole, thus the direction is from south to north.
Q4
Medium
A bar magnet is placed in a uniform magnetic field. What will be the orientation of the magnet when it comes to rest?
A.
Aligned with the magnetic field
B.
Perpendicular to the magnetic field
C.
At an angle of 45 degrees
D.
Opposite to the magnetic field
Show Answer & Explanation
Correct Answer: A
A bar magnet aligns itself with the external magnetic field due to the torque acting on it. When it comes to rest, its magnetic field lines will be aligned with the magnetic field lines of the external field.
Q5
Medium
When a bar magnet is cut into two equal halves, what happens to the magnetic moments of the individual pieces?
A.
Each piece retains the same magnetic moment as the original
B.
Each piece has half the magnetic moment of the original
C.
The magnetic moment becomes zero
D.
The magnetic moment becomes double
Show Answer & Explanation
Correct Answer: B
Cutting a bar magnet into two equal halves creates two new magnets, each having half the length and hence half the magnetic moment of the original magnet. The magnetic moment is proportional to the length of the magnet.
Q6
Medium
A bar magnet is cut into two equal halves. How does the magnetic moment of each half compare to the original?
A.
It remains the same
B.
It doubles
C.
It halves
D.
It becomes zero
Show Answer & Explanation
Correct Answer: C
When a bar magnet is cut in half, the pole strength remains the same, but the length is halved. Therefore, the magnetic moment also halves.
Q7
Medium
If a bar magnet is placed in a uniform magnetic field, which of the following describes the forces acting on it?
A.
Net force is zero, torque is maximum
B.
Net force is maximum, torque is zero
C.
Both net force and torque are maximum
D.
Both net force and torque are zero
Show Answer & Explanation
Correct Answer: A
In a uniform magnetic field, a bar magnet experiences no net force, but it will experience torque, trying to align with the field.
Q8
Hard
A bar magnet is placed in a uniform magnetic field. What will happen to the magnet if it is not aligned with the field?
A.
It will rotate to align with the field.
B.
It will remain stationary.
C.
It will break into pieces.
D.
It will accelerate away from the field.
Show Answer & Explanation
Correct Answer: A
A bar magnet will experience a torque in a magnetic field, causing it to rotate until it aligns with the field.
Q9
Hard
When a bar magnet is cut into two equal halves, what will be the magnetic moment of each half compared to the original magnet?
A.
The same as the original magnet.
B.
Twice the original magnet.
C.
Half of the original magnet.
D.
One-fourth of the original magnet.
Show Answer & Explanation
Correct Answer: C
Cutting a bar magnet in half results in two separate magnets, each with a magnetic moment that is half of the original magnet.
Q10
Hard
If the magnetic field at a point is directed towards the north and the magnet is oriented vertically, what can you infer about the location?
A.
You are at the magnetic south pole.
B.
You are at the magnetic north pole.
C.
You are near the magnetic equator.
D.
You are at the magnetic neutral point.
Show Answer & Explanation
Correct Answer: B
If the magnetic field points north and the magnet is vertical, it indicates proximity to the magnetic north pole, where field lines converge.
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Magnetism and Matter — JEE Physics Practice Questions Online
This page contains 1466 practice MCQs for the chapter Magnetism and Matter in JEE Physics. The questions are organized by difficulty — 329 easy, 653 medium, 484 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.