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 =3 × 106 m/s. a) Find the potential due the electron at the center of the circle. b) Find the electric field due the electron at the center of the circle. c) Find the magnetic field due to the electron at the center of the circle. d) Is this magnetic field 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 field going into the page or coming towards your face as you look down at the electron?

Answer 1

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