Multiple choice

Which of the following objects does NOT use an electromagnet for power?

  1. doorbell

  2. light bulb

  3. hair dryer

  4. MRI machine

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A light bulb uses the heating effect of current (incandescence) or gas discharge to produce light, not an electromagnet. Doorbell chimes, hair dryer motors, and MRI machines all rely on electromagnetic principles.