A 2.36-mm diameter copper wire (resistivity 1.68 × 10-8Ω∙m) carries a current of 15.6 A. What is the potential difference (in volts) between two points 194 m apart?
A carbon resistor has a resistance of 19.17 Ω at a temperature of 21.1 °C. At what temperature (in °C) its resistance will drop to 12.93 Ω? (The temperature coefficient of resistivity for carbon is -5.0 × 10-4/C°.)
A battery with an emf of 5.87 volts and an internal resistance 2.47 ohms is connected in series with an external resistor 176.0 ohms. What is the terminal voltage, in volts, of the battery?
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