Find Magnetic Force: Electron & Proton

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Homework Help Overview

The problem involves calculating the magnetic force experienced by an electron and a proton moving through a uniform magnetic field, with specific velocity components and magnetic field strengths provided. The focus is on understanding the application of the magnetic force equation.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the magnetic force using the provided equation but encounters discrepancies in their results for the electron and proton. Some participants question the need to consider the magnitude of the force in their calculations.

Discussion Status

The discussion has revealed a misunderstanding regarding the requirement to report the magnitude of the force. Participants have acknowledged the oversight and clarified the importance of absolute values in their calculations.

Contextual Notes

There appears to be a misunderstanding regarding the interpretation of the problem statement, particularly in relation to the requirement for magnitude versus vector direction in the force calculations.

Medtner
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Homework Statement


An electron that has a velocity with x component 2.1 × 106 m/s and y component 3.1 × 106 m/s moves through a uniform magnetic field with x component 0.035 T and y component -0.16 T. (a) Find the magnitude of the magnetic force on the electron. (b) Repeat your calculation for a proton having the same velocity.

Homework Equations


Fb=qVxB
q(VxBy-ByBx)

The Attempt at a Solution


I did the work, got an answer for part A which is 7.112e-14
Did the exact same procedure for part B and arrived at -7.112e-14, but the homework website is telling me it's wrong?! Not sure what my error is...
 
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The question asks for the magnitude of the force.
 
*facepalm*

Silly me, I should read questions more carefully. Forgot to absolute value on both parts, only with a it work out by luck! Thanks.
 
OK, good.
 

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