A 100 w , 250 v bulb is put in series with a 60 w, 250 v bulb across a 500 v supply. what will be the power consumed by each bulb
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The blue curve shows the characteristic curve for Lamp1 in series with Lamp2.
The operating point on this curve is found by looking up the combined resistance found for the lamps in circuit2.
The voltages across, current through, and power dissipated by, Lamp1 and Lamp2 are shown in circuit2 once their resistance is corrected for their lower operating voltage and therefore temperature using the respective power curves…
Lamp1= 157.7V, 0.3076A, 48.51W
Lamp2 = 92.3V, 0.3076A, 28.40W
Total Voltage drop across Lamp1 and Lamp2 = 157.7 + 92.3 = 250V
Total Power dissipated by Lamp1 and Lamp2 = 48.51 + 28.40 = 76.91W
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