a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A...

a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A when it is connected to a voltage. At what voltage is it operating? (Express your answer to two significant figures.)

b) A piece of copper wire is 1.00 m long and has a diameter of 2.00 mm. Copper has a resistivity of 1.725⋅10−8Ω1.725⋅10−8Ω

Calculate the resistance of this piece of copper wire. (Express your answer to three significant figures.)

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genius_generous answered 1 hour ago

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