Homework Help: Physics 30

Posted by Farah on Sunday, May 23, 2010 at 12:18am.

A particle accelerated by a potential difference enters a velocity selector. The particle travels staright when the magnetic field is 0.400 T and the electric field is 6.30 x 10^5 V/m. Once the electric field is turned off, a sensor determines that the radius or the particle's path is 4.11 cm.

What is the charge to mass ratio of this particle?

This is what i understand..

1) first find the velocity
using formula v =E/B

2) then use q/m = v / B x r

am I right??

Physics 30 - drwls, Sunday, May 23, 2010 at 12:35am
q V B = m V^2/r, so

q/m = V/(B*r)

Yes to both questions
Physics 30 - Farah, Sunday, May 23, 2010 at 5:53pm
thank you =)

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