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The hot resistance of a bulb’s filament is higher than its cold resistance because the temperature coefficient of the filament is:

The hot resistance of a bulb’s filament is higher than its cold resistance because the temperature coefficient of the filament is: Correct Answer Positive

The filament used in bulb has positive temperature coefficient of resistance i.e. the resistance of the material increases with increase in temperature. Thus, the hot resistance of a bulb’s filament is higher than its cold resistance.

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