The Voltage and Power Ratings of a Particular Light Bulb,which

question 50

Multiple Choice

The voltage and power ratings of a particular light bulb,which are its normal operating values,are 110 V and 60 W.Assume the resistance of the filament of the bulb is constant and is independent of operating conditions.If the light bulb is operated with a current that is 50% of the current rating of the bulb,what is the actual power drawn by the bulb?

• A) 10 W
• B) 15 W
• C) 20 W
• D) 25 W
• E) 30 W

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