An electron in a vacuum along thex-axis is subjected

to a constant electric force in they-direction.

Then the electron enters the magnetic fieldB=B_0e_y.

(1) Describe the path of the electron in the electric field

(2) Explain what happens to the electron due to the

magnetic field?

(3) What is the overall motion of the electron in the magnetic field if

there is:

(a) no electric field present

(b) the electric fieldE=E_0e_y