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Physics · PYQ NEET UG 2024
हिन्दीAn 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:
Correct answer · Option 4
\( \frac{M}{2} \)
Explanation
Each arm has length \( L/2 \). Since the angle between arms is \( 60^\circ \), the distance between the two ends forms an equilateral triangle of side \( L/2 \). The new magnetic moment is \( M' = m \times \frac{L}{2} = \frac{M}{2} \).
