<prompt> About Bragg peak effect of protons all are true, except:Electromagnetic radiationProduce ionization in biological systemThe dose of single beam is 2-4 times greater than the path doseBeam therapy for AV malformation of the brain.  <response>: Ans. a. Electromagnetic radiationThe brag peak is a pronounced peak on the Bragg curve which plots the energy loss of ionizing radiation during its travel through matter.For proton, a-rays, and other ion rays, the peak occurs immediately before the particle come to rest. 