AP EAMCET · PHYSICS · Magnetic Effects of Current
A steel wire of length and magnetic moment is bent into a semicircular arc of radius . The new magnetic moment is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
When wire is bent in the form of semicircular arc then, l=πr ∴ The radius of semicircular arc, r=lπ Distance between two end points of semicircular wire =2r=2lπ ∴Magnetic moment of semicircular wire =m×2r=m×2lπ=2πml But ml is the…
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