Question : Which of the following metals (shown by its symbol) is generally used for making filament of bulbs?
Option 1: Fe
Option 2: Au
Option 3: Ag
Option 4: W
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Correct Answer: W
Solution : The correct option is W .
A bulb's filament is comprised of the metal tungsten (W). Tungsten has a high melting point and is heat resistant, making it ideal for incandescent light bulbs. Because of its high temperature, the filament produces light as it warms up, giving lighting to the bulb.
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