The Voltage Across the Dees of a Cyclotron Is 30,000

Multiple Choice

The voltage across the dees of a cyclotron is 30,000 V. How many revolutions do the protons go through in reaching a kinetic energy of 21 MeV? (1 eV = 1.60 × 10^-19 J, e = 1.60 × 10^-19 C, ^mproton = 1.67 × 10^-27 kg)

A) 2.0 million
B) 1400
C) 700
D) 350
E) 35