# Write the expression for the equivalent magnetic moment of a planer current loop of area A. having N turns and carrying a current i. Use the expression to find the magnetic dipole moment of a revolving electron.

#### for a revolviing electron.

for 1 revolution number of terms=1

i=et

=eV2πR

M=iNA

=eV2πR×1×πR2

=eVR2

we get,

eVR2