A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity ? = 4.50 × 10^?3 / °C. When the filament is hot and glowing, its temperature is seven times room temperature (20 °C). What is the resistance of the filament (in ohms) at room temperature?
a. 234
b. 1 350
c. 2 080
d. 4 530
e. 5 630
a
Physics & Space Science
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Fill in the blank(s) with correct word
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