Physics
Grade-10
Easy

Question

What is the wasted energy when a bulb is switched on?

  1. Electrical
  2. Chemical
  3. Heat
  4. Light

Hint:

Heat energy

The correct answer is: Heat


    • When the bulb is turned on, an electrical current passes through the filament, heating it up so much that it emits light.
    • The thermal energy that is produced by the light bulb is often called wasted heat, because it is difficult to use this form of energy to do work.

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