Magnetic Field

Thread Starter

f74bat

Joined Nov 26, 2008
13
A doubly charged helium atom (mass = 6.68 x 10-27 kg) is accelerated through a potential difference of 3.00x 103 V. What will be the radius of curvature of the path of the atom if it is in a uniform 0.410 T magnetic field?
Part 2:
What is the period of revolution for the atom in the previous question?

Not sure what formula I should use for either of these questions.
I was planning on using r=(mv)/(qB) but i don't have velocity. and the second part i've never seen anything similar to it before.
 
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