Question

Give any one advantage of LEDs over conventional incandescent low power lamps.

Answer 1

Answer:

the have white colour and are good for our eyes

Answer 2

An LED produces much less power as compared to the low power lamps. The intensity of the light is also comparable to the low power lamps. Hence LED can be used to save current.  

Explanation:

• This is because the amount of power consumed is less since power is dependent on the current requirement and LED can work under very less power.  

• So it is very economical to use LED lights for household purpose. The price of LED is also similar to that of a bulb.

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50 lamps each of resistance 100 ohm are connected in parallel across a 220 volts main.Find(a)the power consumed in Watts,and(b)the cost of operating the lamps for 20 hours at 10 paise per kWh.

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