According to Mr. Chung's handouts, the electric currents produced by batteries are direct currents (DC).the electrons flows from negative terminal to positive terminal within the circuits. the circuits drives electric currents to loads and provide power or energy to the loads. then the electric currents return along the conductors back to the source(battery) to finish the circuit.
Some Diagrams:
Also, the speed of eclectic current is much quicker than the individual electrons because of the collisions between the electrons within the metal wires that push the electrons away form one atom and collide with the next.
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