- #1
PeachBanana
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Homework Statement
Protons move in a circle of radius 7.70cm in a 0.536 T magnetic field. What value of electric field could make their paths straight?
Homework Equations
Unsure
The Attempt at a Solution
r = 0.0770 m
B = 0.536 T
m = 1.6*10^-27 kg
q = 1.6*10^-19 C
E = F / q
I'm not sure how to get force without a velocity.