Magnetic Force -- Confused about the direction of the force

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Homework Help Overview

The discussion revolves around understanding the direction of the magnetic force acting on a charged particle moving in a magnetic field. The original poster has calculated the magnitude of the force using the equation F=qvB but is confused about determining its direction.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the application of Fleming's left-hand rule and the corkscrew rule to determine the direction of the magnetic force. There are questions about the correctness of the original poster's answer and the reasoning behind it.

Discussion Status

Some participants are seeking clarification on the original poster's answer and the reasoning behind their confusion. There is an exploration of different rules for determining direction, but no consensus has been reached on the correct approach.

Contextual Notes

The original poster's answer indicates a direction that conflicts with the expected answer, leading to further questioning of assumptions and interpretations of the rules being applied.

Devs

Homework Statement


upload_2017-10-29_17-45-4.png

Homework Equations

The Attempt at a Solution


Hi! I got the magnitude using F=qvB using information from the top of the qs. But the direction is confusing me. I used the Fleming's left hand rule but it sort of isn't giving me the right answer
 

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Devs said:
isnt giving me the right answer
What IS your answer and why do you claim it is wrong ?
 
BvU said:
What IS your answer and why do you claim it is wrong ?

I got an outward direction while the answer says downwards/towards south.
 
Devs said:
I got an outward direction
That would make it parallel to the current. The left- and right-hand rules relate three vectors which are mutually at right angles.
 
For this I learned the corkscrew rule: which way does the corkscrew go when you turn it from ##\vec v## to ##\vec B## ?
 

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