10 question solution Q.10. A cyclotron is used to obtain 2 MeV protons. If frequency is 5 MHz and potential is 20 kV, the magnetic field necessary for resonance is 1) 2.32T 2) 0.327T 3) 0.528T 4) 0.389T Share with your friends Share 2 Vijay Shankar Yadav answered this Dear Student, We have f=Bq2πm5×106=B×1.6×10-192×3.14×1.66×10-27B=5×106×2×3.14×1.66×10-271.6×10-19=.327T Regards 4 View Full Answer Advait.n answered this the answer is a -3