An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction.

Question

An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction.
	a. Find the force on the electron (magnitude and direction). 
	(e = - 1.6 x 10-19 C, m=9.1 x10-31 kg)
	b. Calculate the radius of electron’s path in the magnetic field.

drwls · Answer

(a) F = -e V B Use the right hand rule for direction (b) Review the formula for the "Larmor radius" of a charge in a magnetic field.