Two similar headlight lamps are connected in parallel to each other. Together, they consume 48 W from a 6 V battery. What is the resistance of each filament?
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a
6Ω
b
4Ω
c
3Ω
d
1.5Ω
answer is D.
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Detailed Solution
Power consumed by each lamp is 24 W. Hence, using R = (V2/P), we find R = (36/24) = 1.5 Ω.