An electron beam is first accelerated by a voltage source, and then passes into

Question

An electron beam is first accelerated by a voltage source, and then passes into a region of uniform magnetic field. The experiment is performed in a vacuum tube which is filled with a small amount of phosphor gas so the arc of the electron bean can be seen and measured. Find a new expression for the charge to mass ratio, which will also include the radius of the arc the electron beam would make.
Hint: Your final expressions should not contain the velocity of the beam, as it cannot be directly measured. Think about work and energy to find a way to remove velocity from the equations.

Explanation / Answer

http://www.howeverythingworks.org/complete.html should help.god bless.

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