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1) The electric potential energy stored in the capacitor of a defibrillator is 83 J, and the capacitance is 124 µF. What is the potential difference that exists across the capacitor plates?

2) A resistor is connected across the terminals of a 3.00-V battery, which delivers 2.40 105 J of energy to the resistor in 17 hours. What is the resistance of the resistor?

3) A cylindrical copper cable carries a current of 1190 A. There is a potential difference of 1.60 10-2 V between two points on the cable that are 0.25 m apart. What is the radius of the cable?

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