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A common flashlight bulb is rated at 0.24 A and 2.2 V (the values of the current and voltage under operating conditions). If the
resistance of the bulb filament at room temperature (20°C) is 0.92 02, what is the temperature of the filament when the bulb is on? The
temperature coefficient of resistivity is 5.3 × 10-3K-1 for the filament material.
Number
i 2530
Units
°℃

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