Resistance of an incandescent filament of a bulb is comparatively much – InterviewSolution

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1.	Resistance of an incandescent filament of a bulb is comparatively much more than that when it is at room temperature. Why?
Answer» Solution :The rise in temperature CAUSES a rise in the VIBRATION of the atoms in the filament, increasing the collision between the atoms and the flowing ELECTRONS. The INCREASE in collision decreases the RATE of flow of electrons and hence increases the resistance.

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