Which best contrasts electric doorbells and audio speakers?

Doorbells involve rapid changes in the direction of current, and speakers do not.

Speakers involve rapid changes in the direction of current, and doorbells do not.

Doorbells require closed circuits in order to work, and speakers do not.

Speakers require closed circuits in order to work, and doorbells do not.

Question

Guest

Physics

3 October, 00:06

Which best contrasts electric doorbells and audio speakers?

Doorbells involve rapid changes in the direction of current, and speakers do not.

Speakers involve rapid changes in the direction of current, and doorbells do not.

Doorbells require closed circuits in order to work, and speakers do not.

Speakers require closed circuits in order to work, and doorbells do not.

+1

Answers (1)

Know the Answer?

Journey Harding · Answer 1

The only true statement among the choices is:

Speakers involve rapid changes in the

direction of current, and doorbells do not.

The other three statements are false.