Help please, motion of charged particle in mag field

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Homework Help Overview

The discussion revolves around the motion of a charged particle, specifically a proton, in a magnetic field. The original poster seeks assistance in determining the time it takes for the proton to complete one orbit in a uniform magnetic field of 0.758T.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to identify the necessary formulas to calculate the orbital period of the proton. Some participants suggest exploring the relationship between radius, velocity, and period, while others clarify the derivation of the radius formula.

Discussion Status

The discussion includes attempts to derive relationships between variables involved in the motion of the proton. Some guidance has been offered regarding the connection between tangential speed and the period of motion, but there is no explicit consensus on the final approach.

Contextual Notes

Participants are working with specific values for charge, mass, and magnetic field strength, but there may be uncertainties regarding the relationships between time, radius, and velocity in circular motion.

ballahboy
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A proton moves in a circular orbit perpendicular to a uniform magnetic field of 0.758T. Find the time it takes the proton to make one pass around the orbit.

Just need someone to help me start off. All I have is that the B=0.758T, q=1.6x10^-19C and m=1.67x10^-27kg. What formulas do I need to use to find t?
Thanks
 
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U can prove (i advice u to do it) that

r=\frac{mv}{qB}

Exploit the connection beteen T,v & r.

Daniel.
 
hmm so r=mv/qB is derived from mv^2/r=qvB. I got r=(1.4x10^-8)v. the thing is.. i don't kno the relationship between the time, radius and velocity. Do i use r to find the circumference and multiply that by the velocity? I am not really sure..
thanks for the response
 
Yes,that "v" is the constant tangential speed.Multiplied with the period should give exactly 2\pi r...

Daniel.
 
ok i got the correct answer now.. THanks a lot! :D
 

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