papi Messages 31 Reaction score 0 Thread starter Feb 27, 2009 #1 Homework Statement An electron moves at right angles to a magnetic field of .14T What is its speed if the force exerted on it is 8.7 X 10^-15 N? I am at a complete lossfor this question.
Homework Statement An electron moves at right angles to a magnetic field of .14T What is its speed if the force exerted on it is 8.7 X 10^-15 N? I am at a complete lossfor this question.
hage567 Homework Helper Messages 1,509 Reaction score 2 Feb 27, 2009 #2 Look up magnetic force (or Lorentz force law).
papi Messages 31 Reaction score 0 Feb 27, 2009 #3 so if F=qvB then V=Bq/F but when i plus in the charge for the electron is it negative or positive 1.6 x 10^-19 bc can a velocity be a negative answer?
so if F=qvB then V=Bq/F but when i plus in the charge for the electron is it negative or positive 1.6 x 10^-19 bc can a velocity be a negative answer?