How Does a Magnetic Field Affect an Electron's Motion?

[jand]

You have arranged that the magnetic field in a particular region of space is due North with a value of 0.01 T. An electron enters the field traveling to the West with a speed of 0.12 of the speed of light. As a result, the electron experiences a magnetic force which is upwards.

(a) What is the strength of this magnetic force, in fN? (NOTE: The "f" stands for "femto", which is 10^-15.)

(b) What is the amount of the resulting acceleration of the electron?

(c) What will be the result of the acceleration that you have calculated in part (b)?

The Attempt at a Solution

I am really quite lost.. but this is where I thought I should be starting..

Force Law: Fm = |q|vB
where v = .12(1.3 x10^3) m/s , B = .01 T, q = ?? (I'm not sure?)


any help would be appreciated :)

 

[Doc Al]

Force Law: Fm = |q|vB

OK.

where v = .12(1.3 x10^3) m/s

v is 0.12 times the speed of light. What's the speed of light? (Look it up!)

, B = .01 T

Good.

, q = ?? (I'm not sure?)

What's the charge of an electron? (Look it up!)