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A velocity selector consists of two parallel plates with an electric field strength of 1600 N/C Alpha particles with a velocity of vi = 2900 m/s and vg = 3400 m/s are to be fired horizontally into the middle of the velocity selector (as shown below) The alpha particles travelling at 3400 m/s are to pass through the velocity selector undeflected, while the slower travelling alpha particles will collide with one of the plates. The effects of gravity can be ignored throughout this question. + + Part A Determine the required strength of the magnetic field VO ΑΣ 2 B= т Submit Request Answer Part B The required direction of the magnetic field will be O into the page down O up O out of the page Submit Request Answer Part An alpha particle is a Helium nucleus, which contains two protons and two neutrons, so it has a mass of 6.68x10-27 kg and a charge of 3.20 10-19 C. The slower moving alpha particles will accelerate vertically and collide with the top (negative plate). What will be the acceleration of the alpha particles travelling at 01 =2900 m/s ? IV ΑΣφ ? m/s2