# Deflection due to Magnetic Field

1. Apr 20, 2012

### Alouette

1. The problem statement, all variables and given/known data
The deflection of the electron beam in an old-fashioned tube TV set is accomplished by magnetic forces. Each electron is accelerated through a potential difference of V=30000V. The charge to mass ratio of the electron is 175824175824.176C/kg.

If there is a x2=0.1m gap between the end of the magnetic field region and the end of the tube, how far from the center of the screen does the beam strike?

ynet = y1 + y2 =

2. Relevant equations
R = mv/qB

R = (m/eB)*√(2eVacc/m)

3. The attempt at a solution
I'm not even sure where to begin. The first thing i'm confused by is what do they mean by end of magnetic field region?

2. Oct 30, 2012

### lonely1001

Im having the same problem as above with the same question.
it just that the question above seem to be missing a line of information which is
What magnetic field is required to produce a deflection of y1=0.03m if the magnetic field region is x1=0.065m long?