APFIVE Magnetic Field of a Circular Current Loop
An electron moves with constant speed $v$ in a circular orbit of radius $R$ in the $xy$-plane, centered at the origin. Along the $z$-axis (i.e., at points $(0,0,z)$), at what value(s) of $z$ does the magnetic field produced by the electron reach its maximum magnitude?
A
Maximum at #$z = \\pm R/\\sqrt{2}$#
B
At $$z = \\pm R$$
C
The magnetic field is maximum at $$z = 0$$ (the origin)
D
All points along the $$z$$-axis have equal field strength
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