A wire of total length L carrying a current I is bent into a circle. Its magnetic dipole moment is:
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A wire of total length L carrying a current I is bent into a circle. Its magnetic dipole moment is:

G1 Physics · Accepted Answer

Step 1: Magnetic dipole moment of a current loop is μ=IA. Step 2: If wire length L forms a circle, circumference 2πr=L ⇒ r=L/(2π). Step 3: Area A=πr²=L²/(4π), so μ=IL²/(4π). Answer D. Final answer: (D) IL²/(4π).