Magnitude of force on charged particle

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Homework Help Overview

The discussion revolves around the force experienced by a charged particle moving in a magnetic field, specifically focusing on the equation for this force and its vector representation.

Discussion Character

  • Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the equation for the force on a moving charge, questioning both its scalar and vector forms. There is an inquiry into the cross product involved in the force calculation.

Discussion Status

The conversation has progressed through clarifying the vector form of the force equation and confirming the nature of the cross product in the context of the problem. Some participants express gratitude for the clarification provided.

Contextual Notes

Participants are working within the framework of a homework assignment, which may impose specific constraints or expectations regarding the depth of explanation or derivation required.

Cici2017

Homework Statement


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Homework Equations

The Attempt at a Solution


I know the equation of force on a moving charge in a magnetic field is F=BqV...
Why is the answer A ?
 
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Cici2017 said:
I know the equation of force on a moving charge in a magnetic field is F=BqV...
What is the original vector equation for this force?
 
cnh1995 said:
What is the original vector equation for this force?
F=qvBsinθ ?
 
Cici2017 said:
F=qvBsinθ ?
Yes. It's actually q(vxB), where vxB is the cross product of v and B.
What is the cross product of v and B in this problem?
 
cnh1995 said:
Yes. It's actually q(vxB), where vxB is the cross product of v and B.
What is the cross product of v and B in this problem?
0?
 
Cici2017 said:
0?
Yes.
 
cnh1995 said:
Yes.
Thank you!
 

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