A common flashlight bulb is rated at 0.3 A and 3.3 V (the values of current and voltage under operating conditions). If the resistance of the bulb's tungsten filament at room temperature (20.0 degrees Celsius) is 1.10 Ohms , estimate the temperature of the tungsten filament when the bulb is turned on.
Take the temperature coefficient of resitivity for tungsten to be 4.5e10-3
R = V/I
The Attempt at a Solution
R = 3.3V / 0.3A = 11 Ohms when turned on
Little lost on how to find the temperature when turned on.