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One particular lightbulb has a 0.22-meter length of the tungsten wire used as its filament. This tungsten wire filament has a resistance of 19 ohms at a temperature of 20°C. The tungsten wire filament has a resistance of 240 ohms when this bulb is operated at a potential difference of 120 volts.

Explain why the resistance of the tungsten wire filament increases when the bulb is being operated compared to the resistance of the filament at 20°C.*​

Respuesta :

Explanation:

An increase in temperature occurs when the bulb is being operated. As resistance is directly proportional to temperature which means that an increase n temperature leads to an increase in resistance of a conductor.

Therefore, resistance of the tungsten wire filament increases when the bulb is being operated compared to the resistance of the filament at 20°C.

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