Question
The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60^ at the centre. The magnetic moment of this arc section is
NEET
Physics
Magnetic Properties of Matter
2024
NEET 2024 (Re-NEET)
NEET Physics Question (2024) — Solution
Options
- A. 3 M
- B. 4 M
- C. M
- D. 2 M
Answer
A. 3 M
Step-by-step solution
M=m L R =L R 3 =L R= 3 L M^ =m(2 R) 30^ =m(2) 3 L 1 2 = 3 m L= 3 M
Related: Physics — Magnetic Properties of Matter · All PYQ Banks