Magnetic Field of a Circular Current Loop
An electron moves at a constant speed $v$ in a circular orbit of radius $R$ in the $xy$-plane, centered at the origin. Along the $z$-axis, for which value(s) of $z$ is the magnitude of the magnetic field produced by the electron a maximum?
A
At
B
The magnetic field is maximum at (the origin)
C
All points along the -axis have equal field strength
D
Maximum at #$z = \\pm R/\\sqrt{2}$#
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