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=(mv)/e and k=2m pi^2v^2R^2`
B. `B=(2pimv)/e` and K=`m^2pivR^2`
C. `B=(2pimv)/e` and `k=2mpi^2v^2R^2`
D. B=(mv)/e and `K=m^2pivR^2`

Answer

C