Question

cumulative exam
cumulative exam complete
what happens when someone lets go of the button on an electric doorbell?
the electromagnet gets stronger.
the circuit is broken and the electromagnet turns off.
the current moving through the circuit changes direction.
the metal striker hits the bell.
mark for and return
save and exit

Explanation:

An electric doorbell works using an electromagnet. When the button is pressed, the circuit is closed, allowing current to flow and the electromagnet to activate (pulling the striker to hit the bell). When the button is released, the circuit is broken, so current stops flowing, and the electromagnet turns off. Let's analyze the options:

• "The electromagnet gets stronger" is incorrect because releasing the button stops current, weakening or turning off the electromagnet.
• "The circuit is broken and the electromagnet turns off" matches the mechanism: releasing the button opens the circuit, stopping current and deactivating the electromagnet.
• "The current moving through the circuit changes direction" is incorrect; releasing the button breaks the circuit, not changes current direction.
• "The metal striker hits the bell" happens when the button is pressed (electromagnet pulls the striker), not when released.

Answer:

The circuit is broken and the electromagnet turns off.