Question

If power is 100w nd voltage os 220.Find its resistance.??

Answer 1

Answer:

The resistance will increase due to the heat of the filament. So lets do some maths, 100÷220=0.4545 amps now to find the resistance using ohms law 220÷0.4545=484 ohms. This is when lamp is drawing current. An electric bulb is rated as 220V 100W.

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