Due to the flow of current in a circular loop of radius R having single turn, the magnetic field produced at the centre of the loop is B. The magnetic moment of the loop is
A
BR32πμ0
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B
2πBR3μ0
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C
BR22πμ0
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D
2πBR2μ0
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Solution
The correct option is B2πBR3μ0 For a circular loop,
M=IA(∵N=1)
∴M=IπR2
Now, the magnetic field at the centre of the loop is given by,