When the bulb 50 w, 220v is connected to an 110v supply. Calculate the power generated.
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Power = 50 W
Voltage = 220 V
Power = V^2/R
50 = (220)^2/R
R = (220)^2/50
New Power = (110)^2/R
= (110)^2/((220)^2/50)
= 50/4
= 12.5 W
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