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

  • Thread starter Thread starter jand
  • Start date Start date
  • Tags Tags
    Electron Forces
Click For Summary
SUMMARY

The discussion focuses on the effects of a magnetic field on an electron's motion, specifically in a scenario where an electron enters a 0.01 T magnetic field traveling west at 0.12 times the speed of light. The magnetic force acting on the electron is calculated using the formula Fm = |q|vB, where the charge of the electron is approximately -1.6 x 10^-19 C. The resulting magnetic force is determined to be in the femtoNewton range, and the acceleration can be derived from this force using Newton's second law.

PREREQUISITES
  • Understanding of electromagnetism principles, specifically Lorentz force.
  • Familiarity with the charge of an electron (-1.6 x 10^-19 C).
  • Knowledge of the speed of light (approximately 3 x 10^8 m/s).
  • Basic proficiency in physics equations, particularly F=ma.
NEXT STEPS
  • Calculate the magnetic force on an electron in different magnetic field strengths.
  • Explore the relationship between velocity and magnetic force in charged particle motion.
  • Learn about the implications of magnetic fields on particle accelerators.
  • Investigate the effects of varying angles of entry into magnetic fields on force and acceleration.
USEFUL FOR

Physics students, educators, and professionals in fields related to electromagnetism and particle physics will benefit from this discussion.

jand
Messages
6
Reaction score
0
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 :)
 
Physics news on Phys.org
jand said:
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!)
 

Similar threads

Does levitation distance increase as Fg increase???
  • · Replies 1 ·
Replies
1
Views
1K
Determine the force with which the magnetic field of a coil acts on an infinitesimal cube of iron
  • · Replies 6 ·
Replies
6
Views
1K
Electron in a time variable magnetic field
  • · Replies 5 ·
Replies
5
Views
2K
Determining the magnetic force on an electron
  • · Replies 3 ·
Replies
3
Views
2K
Acceleration of an electron due to Magnetic and Electric fields
  • · Replies 1 ·
Replies
1
Views
2K
(Magnetism) Magnetic pull force on a steel ball
  • · Replies 4 ·
Replies
4
Views
3K
What is the induced magnetic force on this closed current loop?
  • · Replies 12 ·
Replies
12
Views
2K
How does an eddy current brake work exactly?
  • · Replies 2 ·
Replies
2
Views
3K
Electron passing through a magnetic and an electric field
  • · Replies 2 ·
Replies
2
Views
2K
Electric and Magnetic field acting on an electron
  • · Replies 25 ·
Replies
25
Views
6K