When an incandescent light bulb is turned on, the tungsten filament becomes white hot. The temperature coefficient of resistivity fortungsten is a positive number. What happens to the power deliveredto the bulb as the filament heats up? Does the power increase,remain the same, or decrease? Justify your answer. Does the resistance of a copper wire increase or decrease when both the length and the diameter of the wire are doubled? Justify your answer.