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current_voltage_problem1 - Sample problem Topic Current and...

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Sample problem Topic: Current and voltage Problem statement When a car has a dead battery, it can often be started by connecting the battery from another car across its terminals. The positive terminals are connected together as are the negative terminals. The connection is illustrated in the following figure. Assume the current i in the figure is measured and found to be 30A. (a) Which car has the dead battery? (b) If this connection is maintained for 1 minute, how much energy is transferred to the dead battery? Problem solution (a) It depends on the direction of the current. It is shown by the following figure that the
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