
Concept explainers
A proton circulates in a cyclotron, beginning approximately at rest at the center. Whenever it passes through the gap between dees, the electric potential difference between the dees is 200 V. (a) By how much does its kinetic energy increase with each passage through the gap? (b) What is its kinetic energy as it completes 100 passes through the gap? Let r100 be the radius of the proton's circular path as it completes those 100 passes and enters a dee. and let r101 be its next radius, as it enters a dee the next time.(c) By what percentage does the radius increase when it changes from r100 to r101? That is, what is
percentage increase = 100%?

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