Question

answer of 2 question

Answer 1

Ans1.> Copper wire is not used in filament of bulb or as a heating element of heater because:-

1. Its melting point is lower than tungsten and at high temperature the copper will melt.

2. Resistivity of tungsten is higher than copper.

If we use a thick tungsten wire in the electric bulb , then the resistance will get reduced and to achieve the requisite heat, more energy will be spent.

Ans2.> Here are 5 reasons for an easier understanding of why LED lights are better than fluorescent lights –

1. Absence of Ultraviolet Light in LEDs.

2. LED lights can run easily on a low voltage power supply.

3. Switching Fluorescent Lights On and Off Frequently Can Accelerate Bulb Failures.

4. LED Lights are More Durable and lacks mercury.

5. Fluorescent Lights Are Inefficient At High and Low Temperatures.

Hope it helps you.

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