Question

The magnetic field at the centre of a circular loop of area A is B. The magnetic
moment of the loop will be​

Answer 1

#BAL

Magnetic field, B=μ04π2πir=μ0i2rori=2Brμ0

Also, A =πr2orr=(Aπ)

Magnetic moment,

M=iA=2Brμ0A

=2BAμ0×(Aπ)1∖2=2BA3∖2μ0π1∖2