what is the resistance of the bulb
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The typical cold resistance of a 100 W incandescent lamp is about 9.5 ohms. If that resistance stayed the same with 120 V applied, Ohm's Law tells us that the bulb would draw about 12.5 amps and dissipate about 1,500 watts.
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Answer:
400 to 220
Explanation:
calculate the magnitude of current 1=v/r 400 =0.55A
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