Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A bar magnet of magnetic moment 
is placed at right angles to a magnetic induction 
. If a force 
is experienced by each pole of the magnet, the length of the magnet will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Step 1: The force acting on each pole of the magnet in a magnetic field is given by the formula
$$ F = MB $$
where M is the magnetic moment and B is the magnetic induction.
Step 2: If the force is applied to each pole, it can also be expressed via the length of the magnet l:
$$ F = \frac{MB}{l} $$
Step 3: Rearranging this equation gives us the length of the magnet:
$$ l = \frac{MB}{F} $$
Therefore, the correct option is C.
$$ F = MB $$
where M is the magnetic moment and B is the magnetic induction.
Step 2: If the force is applied to each pole, it can also be expressed via the length of the magnet l:
$$ F = \frac{MB}{l} $$
Step 3: Rearranging this equation gives us the length of the magnet:
$$ l = \frac{MB}{F} $$
Therefore, the correct option is C.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
At a point on the earth’s surface the angle of dip, . At a point on the earth’s surface the angl…
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current…
If and be the apparent angles of dip observed in two vertical planes at right angles to each othe…
A 250‐turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 and subject…
A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equil…
The magnetic susceptibility is negative for