Two bulbs rated 100 W, 200 V are connected in series to a 200 V power supply. Find the total power consumed.
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Explanation:
R1 = 100 W
R2 = 200 w
V = 200 v
Req =R1.R2/R1 + R2
=100*200/100+200
=100*200/300
=200/3
P = V²/Req
=(200)²/200/3
=200*200*3/200
=600
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