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A bulb always has
  • a)
    Glass
  • b)
    Current
  • c)
    Filament
  • d)
    Light
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A bulb always hasa)Glassb)Currentc)Filamentd)LightCorrect answer is op...
Understanding the Components of a Bulb
A bulb, particularly an incandescent bulb, is designed to produce light through the process of incandescence. While the other options—glass, current, and light—are related to the functioning of a bulb, the filament is the essential component that directly contributes to light generation.
Key Components of a Bulb:
  • Glass: The outer casing of the bulb protects the internal components. It is usually made of glass to withstand heat and provide clarity for light transmission. However, glass alone does not generate light.
  • Current: Electrical current is necessary for the operation of a bulb. It flows through the filament, allowing it to heat up and produce light. While current is vital for functioning, it is not a physical component of the bulb.
  • Filament: This is the key element of an incandescent bulb. Made of tungsten, the filament is responsible for emitting light when electric current passes through it. As the current heats the filament, it reaches a temperature where it glows and produces light. Thus, the filament is crucial for light generation.
  • Light: Light is the desired outcome of a bulb's operation. While it is the end product, it does not constitute a component of the bulb itself.

Conclusion:
In summary, while all options are related to a bulb's functioning, the filament is the only physical component that directly generates light. Understanding this distinction is crucial for comprehending how incandescent bulbs work.
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A bulb always hasa)Glassb)Currentc)Filamentd)LightCorrect answer is op...
A bulb, referring to an electric light bulb, typically contains a filament. The filament is a thin wire, usually made of tungsten, that emits light when an electric current passes through it. While a bulb also consists of glass (a) as the outer casing, requires current (b) to function, and produces light (d), the filament is the component that is always present in a bulb.
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