Flow speed, electric generator, and mass spectrometer: Putting it all together...

Flow speed, electric generator, and mass spectrometer: Putting it all together

An electron moves at speed 8.0 x 10⁶ m/s toward the right between two parallel plates, such as shown in Figure P17.41. A 0.12-T magnetic field points into the paper parallel to the plate surfaces. (a) Determine the magnitude and direction of the magnetic force that the magnetic field exerts on the electron. (b) What should be the magnitude and direction of an field caused by oppositely charged plates to produce an electric force that just balances the magnetic force?