Saurabh Koranglekar
An electric field excerts a force on a charge, independent of the speed of that charge. The force is determined by the strength of the field alone, and is in the direction of the field. This means that the force does not always result in a deflection.
A magnetic field excerts a force on a moving charge, where the force is proportional not only to the field strength but also to the speed of the charged particle. The direction is perpendicular to the field and perpendicular to the direction of motion. This means that the force always results in a deflection.
