Question: In an automobile, the system voltage varies from about 12V when the car is off to about 13.8V when the car is on and the

In an automobile, the system voltage varies from about 12V when the car is off to about 13.8V when the car is on and the charging system is in operation, a difference of 15%. By what percentage does the power delivered to the headlights vary as the voltage changes from 12 V to 13.8V? Assume the headlight resistance remains constant.

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