Which of these devices does NOT contain a magnet or electromagnet? a doorbell an electric motor a light bulb a telep

Question

Which of these devices does NOT contain a magnet or electromagnet?
a doorbell
an electric motor
a light bulb
a telephone

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Trúc Chi 3 years 2021-08-06T18:07:27+00:00 2 Answers 69 views 0

Answers ( )

  1. sori
    1
    2021-08-06T18:08:41+00:00
    Reply

    C. A lightbulb

    This is because a light bulb uses a filament to send a current to turns electricity into light. Because filaments are mostly made of tungsten, the resistance of the filament gets so hot that it heats the light bulb.

    This process does not need a magnet or electromagnet like the doorbell, electric motor, and telephones need magnets.

  2. bonexptip
    1
    2021-08-06T18:09:15+00:00
    Reply

    A light bulb don’t have magnet

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