effect on electron in magnetic field

by xiangyu7
Tags: effect, electron, field, magnetic
xiangyu7 is offline
Oct10-05, 06:42 AM
P: 1
Here's a question that i'm quite confused about:

A uniform constant magnetic field is directed into the page. An electron of constant mass and charge follows a clockwise spiral of decreasing radius path. Is the particle spead increasing or slowing down? and Why?
Phys.Org News Partner Science news on Phys.org
Lemurs match scent of a friend to sound of her voice
Repeated self-healing now possible in composite materials
'Heartbleed' fix may slow Web performance
curly_ebhc is offline
Oct10-05, 06:59 AM
P: 30
I see two forces here (sort of, one is a consequense of the other):

1st force (the real one): The electromagnetic force
Look at what you have:
B-field, velocity, charge (its an electron)

2nd force (implied in the motion): Centripital Force
What the first force is doing. Set the two equal. See what happens when you vary radius.

Don't forget Centripital force= mass x centripital acceleration

That should get you through the problem.


Register to reply

Related Discussions
Electron in magnetic field Classical Physics 7
force on an electron from a magnetic field Introductory Physics Homework 4
Modeling an electron in a Magnetic Field Introductory Physics Homework 3
Electron in Magnetic Field Introductory Physics Homework 1
electron in magnetic field Introductory Physics Homework 5