Force exerted by a current carrying wire

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Homework Help Overview

The problem involves a current-carrying wire and the force exerted on an electron moving parallel to it. The context is rooted in electromagnetism, specifically relating to magnetic fields generated by currents and the forces on charged particles within those fields.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relevance of various laws, such as Coulomb's Law and Ampere's Law, while questioning the appropriate methods to determine the force on the electron. There is an exploration of the right-hand rule for determining the direction of the magnetic field and the force.

Discussion Status

The discussion is ongoing, with participants offering hints and confirming the validity of certain approaches. There is a recognition of the need to focus on the magnetic field's role in the problem, and some participants express confidence in the direction of their reasoning.

Contextual Notes

Participants note that the wire is not charged, which raises questions about the applicability of Coulomb's Law in this scenario. There is also a mention of the electron's velocity and its relationship to the magnetic field, suggesting that assumptions about the setup are being examined.

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Homework Statement


A long thing wire carries a current of 2.0A.
An electron of charge -1.6x10^-19 moves parallel to the wire at a distance, d of 0.01m
The electron velocity is 100km/s.

State the magnitude & direction of the force acting on the electron.

Homework Equations


Hmmm! Not really sure about this. Should I use Coulombs Law? Momentum. Newton's 2nd F=dp/dt
q1 q2 / 4∏εr2 rhat

Certainly Right hand rule.

The Attempt at a Solution

 
Last edited:
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The wire is not charged, Coulomb's law is not relevant.

Hint: The force comes from the magnetic field.
 
Well direction magnetic field of wire is found by the"right hand rule";
grab wire with thumb pointing in direction of current & mag field goes in direction of curl of fingers around the wire.
Then force is mutually perpendicular to v & B as I understand.

Good start I think. Yes?

I will try to put more down as I have time.
 
Ah! Amperes law I think to find strength of magnetic field. Yes or no.
 
That is the correct approach, right.
 

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