Physics · Moving Charges and Magnetic Field

NEET (UG) 2024 — Question 44

An iron bar of length $L$ has magnetic moment $M$ . It is bent at the middle of its length such that the two arms make an angle $60^{\circ}$ with each other. The magnetic moment of this new magnet is :

Option A:
$M$
Option B:
$\frac{M}{2}$
Correct
Option C:
$2 M$
Option D:
$\frac{M}{\sqrt{3}}$

Answer: B

Step-by-step solution

Magnetic moment M = mL where m is magnetic strength and L is length. New magnetic moment: $M' = m \times \frac{L}{2} = \frac{mL}{2}$ $M' = \frac{M}{2}$

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Exam: NEET (UG) 2024
Paper: 2024 paper
Subject: Physics
Chapter: Moving Charges and Magnetic Field
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Step-by-step solution

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