GATE EE 2014 Set 1 — Question 39

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NAT+2 / -0MediumR, L, C & M ElementsNetwork Elements & SourcesElectric Circuits

Electric Circuits → Network Elements & Sources → R, L, C & M Elements

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An incandescent lamp is marked 40 W,240V40\text{ W}, 240\text{V}. If resistance at room temperature (26C26^\circ\text{C}) is 120 Ω120\ \Omega, and temperature coefficient of resistance is 4.5×103/C4.5 \times 10^{-3}/^\circ\text{C}, then its ‘ON’ state filament temperature in C^\circ\text{C} is approximately _______
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