Physics
Grade-7
Easy
Question
Which one of the following devices is based on the heating effect of electric current?
- A fan
- A bulb
- A grinder
- An electric bell
Hint:
A bulb
The correct answer is: A bulb
In an electric bulb, as the current passes through it, its metal filament gets heated up and start emitting light. Hence, anelectric bulb works on the principle of the heating effect of the electric current.
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