An alternating electric field, of frequency v, is applied across the dees (radius=R) of a cyclotron that is being used to accelerate protons (mass=m) the operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton beam, produced by it, are given by:

Options

A. `B=(2pimv)/(e)andK=2mpi^(2)v^(2)R^(2)`
B. `B=(mv)/(e)andK=m^(2)pivR^(2)`
C. `B=(mv)/(e)andK=2mpi^(2)v^(2)R^(2)`
D. `B=(2pimv)/(e)andK=m^(2)pivR^(2)`

Answer

A