An electric bulb is rated 60W, 240V. Calculate theresistence. if the voltage drops to 192V.calculate the poer consumed and current drawnby the bulb
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P=V²/R
60 W =240²/R
R=240²/60
R=57600/60
=960 ohm
now voltage dropped to 192 V
I=V/R
I=0.2 A
P=I²R
P=0.04×960
P=38.4 W
60 W =240²/R
R=240²/60
R=57600/60
=960 ohm
now voltage dropped to 192 V
I=V/R
I=0.2 A
P=I²R
P=0.04×960
P=38.4 W
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