|MLA Citation:||Bloomfield, Louis A. "Question 1003"|
How Everything Works 18 Jun 2018. 18 Jun 2018 <http://howeverythingworks.org/print1.php?QNum=1003>.
In a flashlight, the batteries provide the charges with power and the light bulb makes use of the power. The charges first flow through the battery (which gives them energy), then through wires to the light bulb, then through the light bulb (where they give up their energy), and finally back through wires to the battery. The charges move in a loop—a circuit—so that they don't accumulate anywhere. They travel endlessly between battery and bulb, shuttling energy from the battery to the bulb. As is always the case in electric circuits, two wires connect the battery and bulb—one wire to carry charges to the bulb and one wire to return them to the battery to begin their trip over again.