PHYS1171 Lecture Notes - Lecture 10: Electric Charge, Electric Field, Test Particle
Document Summary
A charged particle in an electric field will feel a force that is proportional to the electric field. The strength of the electric field, e, at a particular place, produced by a certain charge, q, depends on the amount of charge and the distance of the charge from the place you are interested in: If there were more than one charge near our test subject, they would all be acting, and would add as vectors: the test charge would experience a nett force due to all those charges. This means that we can detect the presence of charge, or movement of charge, in some region by measuring the voltage that exists between a pair of electrodes connected to two points in that region. This is the idea behind the medical diagnostic techniques of ecg and. Quiz: a water molecule has no nett charge. False: coulomb"s law exemplifies equal and opposite forces.
