1.An alpha particle (two protons and two neutrons) traveling east at 2.0 x 105 cm/s enters a magnetic field of 2 mT pointing in the perpendicular direction. What is the force acting on the alpha particle? (2 Marks)(2 Marks)(2 Marks) b. 5 MHzc. Compare on the results obtained at the two frequencies and write the conclusion (2 Marks)a.the propagation constant at 400 MHzb.the ratio of the velocity v to the free-space velocity c