GATE Electrical Engineering (EE) 2014 Shift 1 Solved Paper

Question : 39 of 65

Marks: +1, -0

An incandescent lamp is marked 40 W, 240 V. If resistance at room temperature (26°C) is 120 Ω, and temperature coefficient of resistance is 4.5x10^-3/°C, then its ‘ON’ state filament temperature in °C is approximately ____