Q. In the given diagram an electron is given a speed v at P towards A then time after which it comes out of the magnetic field B m is the mass of electron- 1 . m π 2 e B 2 . 2 m π e B 3 . 3 m π 4 e B 4. It will never come out of the magnetic field Share with your friends Share 3 Vijay Shankar Yadav answered this Dear Student, Radius of the path =mveBso path length through which comes out =π2mveBhence time =length velocity=mvπ2eBv=mπ2eB Regards -3 View Full Answer