NEET · Physics · STD 12 - 4. Moving charges and magnetism
A wire of length \(L\) metre carrying a current of \(I\) ampere is bent in the form of circle. Its magnetic moment is
- A \(\frac{I L^{2}}{4 \pi} A \;m^{2}\)
- B \(\frac{I L^{2}}{4} A \;m^{2}\)
- C \(\frac{I \pi L^{2}}{4} A \;m^{2}\)
- D \(\frac{2 I L^{2}}{\pi} A \;m^{2}\)
Answer & Solution
Correct Answer
(A) \(\frac{I L^{2}}{4 \pi} A \;m^{2}\)
Step-by-step Solution
Detailed explanation
Length of wire, \(L =2 \pi R\) Radius of loop, \(R=\frac{L}{2 \pi}\)
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