A) Resistance of an incandescent filament of a lamp is comparatively much more than that when it is at room temperature. Why?
A) Resistance of an incandescent filament of a lamp is comparatively much more than that when it is at room temperature. Why?
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Answer:
Explanation:
Resistance of a conductor depends on the resistivity of the material it is made up of. And this resistivity tends to increase with increase in temperature and decrease with decrease in temperature.