The material used in the filament of electric bulbs is_________________?
Correct answer: B. Tungsten
- A. Nichrome
- B. Tungsten
- C. Constantan
- D. German silver
Explanation
Tungsten is used for bulb filaments because it has a very high melting point and can operate incandescently without rapidly vaporising. Nichrome is mainly used as a resistance-heating alloy rather than a bulb filament.
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