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Tungsten is used for the construction of filament in electric bulb because of its
- a)High melting point
- b)Low specific resistance
- c)High light-emitting power
- d)High specific resistance
Correct answer is option 'A'. Can you explain this answer?
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Tungsten is used for the construction of filament in electric bulb be...
Tungsten has the highest melting point and lowest vapour pressure of all metals
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Tungsten is used for the construction of filament in electric bulb be...
Metal Filaments in Electric Bulbs
Tungsten is commonly used for the construction of filaments in electric bulbs due to its high melting point.
High Melting Point
- Tungsten has the highest melting point of any metal, reaching as high as 3,422 degrees Celsius (6,192 degrees Fahrenheit).
- When an electric current passes through the filament, it heats up and emits light.
- The high melting point of tungsten allows the filament to reach extremely high temperatures without melting or deforming.
- This ensures that the filament can withstand the intense heat generated by the electric current and continue emitting light for a long period of time.
Other Factors
- While the high melting point is the primary reason for using tungsten, there are other factors to consider as well:
- Low specific resistance: Tungsten has a relatively high specific resistance, which means it resists the flow of electric current.
- High light-emitting power: Tungsten has excellent light-emitting properties, allowing it to produce a bright and efficient light source.
- High specific resistance: Although tungsten has a relatively high specific resistance, this property is not the main reason for its use in electric bulbs.
Conclusion
In conclusion, tungsten is used for the construction of filaments in electric bulbs primarily because of its high melting point. This characteristic allows the filament to withstand the high temperatures generated by the electric current, ensuring long-lasting and efficient light emission. Although tungsten also possesses other desirable properties, such as low specific resistance and high light-emitting power, its high melting point remains the key factor in its selection for this application.
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Tungsten is used for the construction of filament in electric bulb because of itsa)High melting pointb)Low specific resistancec)High light-emitting powerd)High specific resistanceCorrect answer is option 'A'. Can you explain this answer?
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