which one has more resistance -100watt bulb or 60 watt bulb,both operating at 220v?
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Answered by
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Answer:
We have the equation :
Power=(Voltage)²/Resistance
P=V²/R
Resistance of First bulb,R1=V²/P1=220*220/100=484 ohms.
Resistance of Second bulb,R2=V²/P2=220*220/60=806.66666.....
Therefore the second bulb has more resistance.
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