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Cathode Ray Tube

  • Thread starter soul5
  • Start date
64
0
1. Homework Statement
A positively charged particle of mass 7.2 * 10^-8kg is travelling east with speed of 85 m/s. The particle enters a 0.31 T uniform magnetic field, and 2.2 * 10^-3 secounds later leaves the field one-quarter south with speed of 85 m/s. What is the charge of the particle and magnetic force?


2. Homework Equations

Fc=Fm

mv^2/r=qvB

Fm=qvB

3. The Attempt at a Solution

I tried but I don't have radius and charge what do I do?
 

Answers and Replies

Nabeshin
Science Advisor
2,204
16
I think because they give you a time here you can calculate the period for what would be a complete circular orbit, and then extrapolate the radius. From there, I think you should be able to solve it.
 

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