Question
Download Solution PDFIn a metal filament bulb, the filament used as a heating coil is tungsten due to its _______.
This question was previously asked in
SSC JE Electrical 11 Oct 2023 Shift 3 Official Paper-I
Answer (Detailed Solution Below)
Option 3 : high melting point and high resistivity
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Download Solution PDFTungsten is used for making filament for the electric bulb, because of the following reasons:
- It has a high melting point and retains its strength when heated.
- Due to high resistivity, it does not burn at room temperature but the bulb glows at high temperatures.
- It is very resistant to corrosion and has high tensile strength.
- Tungsten filament is highly flexible so it can be molded into any shape.
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