Multiple choice

Which of the following is a physical change?

  1. Glowing of an electric bulb

  2. Respiration

  3. Digestion of food

  4. Burning of wax
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glowing of an electric bulb is a physical change because when electric current is passed through the filament of a bulb, the filament starts glowing and the glow stops as soon as the current is cut off. The chemical composition of tungsten filament does not change.

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