An electric bulb is rated at 60 w,240 v.calculate its resistance.if the boltage drops at 192 v,calculate the power consumed and the current drawn by the bulb(assume that the resistance of the bulb remain unchanged)
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P=V*I
60W=240V*I
240V*I=60W
I=p/v
I=60W/240V
I=1/4=0.25
CASE 2
I REMAINS UNCHANGED SO
P=V*I
P=192V*1/4[FOR EASY CALCULATION LEAVE THE FRACTION WITHOUT CALCULATING]
P=48W
60W=240V*I
240V*I=60W
I=p/v
I=60W/240V
I=1/4=0.25
CASE 2
I REMAINS UNCHANGED SO
P=V*I
P=192V*1/4[FOR EASY CALCULATION LEAVE THE FRACTION WITHOUT CALCULATING]
P=48W
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