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A carbon-core resistor consists of a carbon rod having a length of 3.25 mm, a diameter of 0.0350 mm and a resistivity of 3500x108

 

A carbon-core resistor consists of a carbon rod having a length of 3.25 mm, a diameter of 0.0350 mm and a resistivity of 3500x108 m. a) What is the value of the cross-sectional area of the carbon rod. Be sure your answer is in m. b) What is the resistance of the carbon rod? c) If a current of 2.25 A passes through the resistor, what is the voltage across the resistor?

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