# Magnetic Fields

Watch
Announcements
#1
Why is a force exerted on a charged particle when it enters a magnetic field?
0
4 years ago
#2
(Original post by Hamza Rashid)
Why is a force exerted on a charged particle when it enters a magnetic field?
When a charge enters a magnetic field, the particle is attracted by the field lines of magnetic field. This has something to do with the charge of the particle. This attraction is the field force of the magnetic field and this exerted the force on charges.

The force which is exerted on a charged particle in magnetic field is force = B*e*v. 'e' is the charge of the particle, a constant. 'v' is the velocity of the particle when the particle is moving in magnetic field. And last but not least, B is the flow density of magnetic field.*

Say velcotiy is not changed, the force would depend on flow intensity of magnetic field (please note: if the velocity does really NOT changed). That is to say, the force is stronger the more homogen field lines exist. Homogen means that the field lines have the same distance to each other (means that the same field force exists everywhere in magnetic field).

To sum up: higher flow density -> more (homogen) field lines in magnetic field -> stronger the magnetic field -> stronger the attraction to the charge -> stronger the force to particle.

Hope that is helpful for you. **
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### How would you feel if uni students needed to be double vaccinated to start in Autumn?

I'd feel reassured about my own health (33)
14.8%
I'd feel reassured my learning may be less disrupted by isolations/lockdowns (68)
30.49%
I'd feel less anxious about being around large groups (27)
12.11%
I don't mind if others are vaccinated or not (19)
8.52%
I'm concerned it may disadvantage some students (13)
5.83%
I think it's an unfair expectation (60)
26.91%
Something else (tell us in the thread) (3)
1.35%