A neutron , electronand a proton enter a region of uniform magnetic field with same velocities normal to the field. The magnetic field is along the outward normal to the plane of the diagram. Draw a diagram to show the tracks of the three particles and compare the paths of proton and electron.

Force acting on the charge particle in perpendicular uniform magnetic field B.F= qVBmv2r= qVBr = mvqBmass of electron < mass of the proton<mass of the neutroncharge on electron = charge on proton = neutron is then neutral particle and it won't experinece any force in magnetic field.rpre = mpmeradius of the trajectory of the photon > radius of the trajectory of the electron.

green : neutron
red: electron
blue : proton


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