You are observing an electron in an evacuated column moving from the roof top down to your table (in your usual Physics classroom where you are facing the main front screen) at a speed of 2 x 10 m/s towards two parallel plates intersecting the Y-axis at (0 mm, 1 mm, 0 mm) and (0 mm, -1 mm, 0 mm). Take the +X as the horizontal axis to the right and the +Y-axis the vertical axis towards the front screen, both in the plane of the table. Assume also the + Z-axis as the Normal to the table facing the roof of the class. The plate intersecting the Y axis at (0 mm, 1 mm, 0 mm) is 200 V higher electric potential than the one intersecting the Y axis at (0mm, -1 mm, 0 mm). Determine the required magnetic field that will make the electron to continue its trajectory undeflected. Use the method of determinants for vectors' cross product to verify your answer.

You are observing an electron in an evacuated column moving from the roof top down to your table (in your usual Physics classroom where you are facing the main front screen) at a speed of 2 x 10 m/s towards two parallel plates intersecting the Y-axis at (0 mm, 1 mm, 0 mm) and (0 mm, -1 mm, 0 mm). Take the +X as the horizontal axis to the right and the +Y-axis the vertical axis towards the front screen, both in the plane of the table. Assume also the + Z-axis as the Normal to the table facing the roof of the class. The plate intersecting the Y axis at (0 mm, 1 mm, 0 mm) is 200 V higher electric potential than the one intersecting the Y axis at (0mm, -1 mm, 0 mm). Determine the required magnetic field that will make the electron to continue its trajectory undeflected. Use the method of determinants for vectors' cross product to verify your answer.