Question

The diagram shows the set-up for an electric doorbell.

At bottom, a doorbell. Starting from midright, a wire attached to a contact screw runs to a power source and then to a bell and then to coil around both arms of a U shaped iron core. The coils plus core is labeled electromagnet with the lower arm of the core labeled N and the upper arm labeled S. The wire emerges from the coils to attach to a steel bar at its top end. The bottom end of the steel bar has a short piece of wire leading to a striker.
Which best explains why the bell would not ring in this set-up?

The circuit is open.
The electromagnet has an iron core.
The circuit is closed.
The electromagnet is made of steel.

Answer 1

Answer:

i think because the circuit is open.

Explanation:

hope it helps:)

Answer 2

Answer:  The circut is open or A

Explanation: