What is the force between moving charges?

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Homework Help Overview

The discussion revolves around understanding the forces between moving charges, particularly focusing on parts B and C of a problem involving magnetic and electric forces. The context includes equations related to these forces and their interactions.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants express confusion regarding the calculations for parts B and C, questioning the distance squared in the equations and the relationship between electric and magnetic forces. Some participants suggest considering the angle of motion relative to the magnetic field.

Discussion Status

The discussion is ongoing, with participants actively seeking clarification on specific aspects of the problem. There are indications of multiple interpretations being explored, particularly regarding the effects of angles and the relative magnitudes of forces.

Contextual Notes

Participants mention constraints such as limited attempts remaining and the need to understand the relationship between electric and magnetic forces without providing definitive answers.

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Homework Statement



http://img207.imageshack.us/img207/4245/picture2jwi.png

Homework Equations



see picture

The Attempt at a Solution



I don't know what is going wrong with part B and I'm running out of attempts! Please help me with that and part C as well.

Thanks
 
Last edited by a moderator:
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j88k said:

Homework Statement



Homework Equations



The Attempt at a Solution



I don't know what is going wrong with part B and I'm running out of attempts! Please help me with that and part C as well.

Thanks

F = q2v X B1 = q2v *μo*q1v/(4π*2d2)

Your distance squared is 2d2 isn't it?
 
For part C) consider that

εoμo = 1/c2
 
didn't get it.. one more attempt left..

http://img17.imageshack.us/img17/3769/picture2zjr.png




and the answer for part C would be: The magnitude of the electric force is greater than the magnitude of the magnetic force. ?
 
Last edited by a moderator:
anyone?
 
I think the problem is that the second charge is moving at an angle to the field generated by the other charge.

I think the F then is a factor of √2/2 off. (The value of sinθ that v is relative to the B field.)
 

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