Physics
Grade-7
Easy
Question
What is the underlying principle that causes an electric bulb to glow?
- Heating effect of current
- Chemical effect
- Conduction of current
- Magnetic effect of current
Hint:
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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