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ch. 19 #2 A battery with an emf of 12.0 V shows a terminal voltage of...

ch. 19 #2

A battery with an emf of 12.0 V shows a terminal voltage of 11.5 V when operating in a circuit with two lightbulbs, each rated at 4.0 W (at 12.0 V), which are connected in parallel.

Part A

What is the battery's internal resistance? Express your answer to two significant figures and include the appropriate units.

Part B

Eight 9.5-W Christmas tree lights are connected in series to each other and to a 120-V source.

What is the resistance of each bulb?

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