Question

The electric field between the plates of the capacitor shown in the figure below is 1.12 !105 N / m and the applied magnetic field is everywhere 0.54T. Once leaving the electric field region, a stream of singly ionized selenium ions moves in a circular path with a radius of 31cm in the magnetic field. (a) Copy the figure below onto your paper, and draw in the electric field corresponding to the given situation, as well as the electric force acting on the particles. It is known that the particles are heading straight down along the dashed vertical line. This is possible, because of the applied magnetic field. Indicate in the sketch, which way this field must point in order for the particles to not be deflected. What information about the particle can we obtain from this setup? Calculate the quantity in question. (b) Determine the mass of one selenium ion and the mass number of this selenium isotope if the atomic mass unit is 1u =1.66 !10"27 kg and the mass number is obtained by rounding the mass of the isotope to the nearest integer.

Answer 1