Question

when an electric circuit operates, a buzzer makes a sound. what happens to the electric charges in this circuit? the electric charges move from the energy source and are used up at the switch. the electric charges move from the energy source and are used up at the buzzer. the electric charges move from the buzzer through the energy source and back to the buzzer. the electric charges move from the energy source through the buzzer and back to the energy source.

Explanation:

In an electric circuit, electric charges (electrons) flow in a closed - loop. They start from the energy source (like a battery), pass through the load (the buzzer in this case) to do work (make the buzzer sound), and then return to the energy source to complete the circuit. Electric charges are not "used up" at the switch or the buzzer.

Answer:

The electric charges move from the energy source through the buzzer and back to the energy source.