Question
Download Solution PDFRead the statements given below and choose the correct options:
Assertion (A): The filament of an incandescent bulb is made up of tungsten.
Reason (R) : Tungsten has low resistance and high melting point.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Properties of Tungsten:
- Tungsten is chosen for the filament of incandescent bulbs because of its unique properties.
- Tungsten has a very high melting point (about 3422°C or 6192°F).
- It also has high resistivity, which means that it can withstand high temperatures before melting and can emit light efficiently when a current passes through it.
Explanation:-
- Assertion (A) states that the filament of an incandescent bulb is made up of tungsten. This is correct because tungsten is the material commonly used for bulb filaments due to its high melting point.
- Reason (R) states that tungsten has low resistance and high melting point. While the high melting point part is correct, tungsten actually has high resistance, not low resistance. This part of the reason is incorrect.
On analyzing both the statements:
- 1) (A) is true and (R) is false.
Last updated on Apr 30, 2025
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