<span>The number of waves that pass a particular point in a body in a unit of time is called the frequency of the waves. The unit of requency is Hz (hertz). The frequency counts how many cycles were made per second</span>
The particles that carry charge through wires in a circuit are mobile electrons. The electric field direction within a circuit is by definition the direction that positive test charges are pushed. Thus, these negatively charged electrons move in the direction opposite the electric field.