Physics
Grade-7
Easy

Question

What is the underlying principle that causes an electric bulb to glow?

  1. Heating effect of current
  2. Chemical effect
  3. Conduction of current
  4. Magnetic effect of current

hintHint:

The bulb glows due to the heat effect of the current.

The correct answer is: Heating effect of current


    • The electric current flow in a circuit is occupied by the load.
    • A glowing bulb is a load that uses the electric current.
    • The glowing bulb is a heating effect of current.

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