Question

You might have noticed that a glowing electric bulb become warm. Do you know why?

Answer 1

The filament of electric bulb is made up of tungsten . It's a good conductor of electricity . When current passes into the bulb , heat will be produced and the bulb becomes warm . 

Answer 2

Explanation:

• The electric bulb has a filament-like structure. The 'filament' is made by the tungsten.
• When the electricity passes through the filament then the filament became hot and it produces heat so the bulb became hot or warm.
• The tungsten is the good conductor of the electricity. So it became hot when the electricity passes through the filament. So the bulb became hot due to the heat of the filament when it is glowing.

To know more

Why tungsten is not used as a fuse wire

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Give reason why (i)tungsten is used for making filament of electric lamps; (ii) the elements of heating electrical appliaces are made up of an alloy rather than pure metal

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