Question
Download Solution PDFWhich of the following metal is commonly used as filament for an electrical bulb?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Tungsten.
Key Points
- Tungsten is commonly used as a filament in electrical bulbs due to its high melting point and excellent electrical conductivity.
- Tungsten can withstand high temperatures without melting, making it ideal for use in incandescent bulbs where the filament needs to be heated to produce light.
- It has a melting point of approximately 3422°C, which is the highest among all metals, ensuring durability and efficiency.
- The high tensile strength of tungsten helps the filament to maintain its shape and resist sagging or breaking over time.
- Tungsten filaments are also efficient in converting electrical energy into visible light, providing a bright and consistent light output.
Additional Information
- Other metals like titanium, gold, and brass are not suitable for filaments due to their lower melting points and poorer electrical efficiency.
- Modern advancements have led to the development of LED bulbs, which use semiconductors instead of metal filaments, offering higher energy efficiency and longer lifespan.
- The transition from incandescent bulbs to more energy-efficient lighting solutions like CFLs and LEDs is driven by the need to reduce energy consumption and environmental impact.
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