In an ink jet printer an ink droplet of mass m is given a

Last updated: 6/24/2023

In an ink jet printer an ink droplet of mass m is given a negative charge q by a computer controlled charging unit and then enters at speed v in the region between two deflecting parallel plates of length L separated by distance d see figure below All over this region exists a downward electric field which you can assume to be uniform Neglecting the gravitational force on the droplet the maximum charge that can be given so that it will not hit a plate is close to 1 mv E dL E L 2 mv d EL