Question

An electron moves in a circular orbit of radius 0.1 mm, counterclockwise as you
look down at it, moving in a plane above and parallel to the plane of your exam
paper. The velocity of the electron is v = 3VX10^6 m/s.
a) Find the potential due the electron at the center of the circle.
b) Find the electric eld due the electron at the center of the circle.
c) Find the magnetic eld due to the electron at the center of the circle.
d) Is this magnetic eld going into the page at the center of the circle or coming
towards your face at the center of the circle as you look down at the electron?
e) Now we stop the electron from moving in a circular orbit of radius 0.1 mm. Can
there be now a magnetic eld going into the page or coming towards your face as
you look down at the electron?

Answer 1