The direction of proton in a magnetic field

  • Thread starter ASidd
  • Start date
  • #1
73
0

Homework Statement



A positive charge is moving straight ahead in a magnetic field going out of page. What is the direction of force on the positively charged particle?

The Attempt at a Solution


I know that you use the right hand rule where fingers show direction of force. But I'm confused because my fingers keep pointing up in one direction and then down in the other so I'm very confused.
 

Answers and Replies

  • #2
168
0
So the magnetic force is [itex] \vec{F} = q\vec{v}\times \vec{B}[/itex]
q is the positive charge. I do not know what straight ahed means, I assume that you have a sketch. Your thumb on the right hand shall be in the direction of the velocity and your index finger along the magnetic field, then your middle finger will give the force direction since the charge is positive.
Alternatively you could define your vectors and calculate a crossproduct i.e. define a coordinate system.
 

Related Threads on The direction of proton in a magnetic field

  • Last Post
Replies
0
Views
3K
  • Last Post
Replies
4
Views
10K
  • Last Post
Replies
7
Views
4K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
710
Replies
6
Views
8K
  • Last Post
Replies
10
Views
12K
  • Last Post
Replies
17
Views
16K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
6
Views
1K
Top