In Thomson’s experiment, the potential difference of a cathode tube is 350 V, the magnetic field used in the experiment is 5×10-2 Tesla, and with known electrical charge and mass, calculate
(a) The velocity of electron at anode. (5)
(b) The radius of electron beam when travelling perpendicular through the magnetic field. (5)
(c) Find the magnitude of the electric field that needs to be applied in order to turn the electron beam into a straight path again. (5)