A battery with an emf of 12 V and an internal resistance of 0.8 ohm is to be recharged through a 20 V source. (a) show by means of a diagram the connection of the circuit elements. (b) What is the current in the circuit? (c) The recharging current is to be limited to 3A. What is the value of the limiting resistor?

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter27: Direct-current Circuits
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4. A battery with an emf of 12 V and an internal resistance of 0.8 ohm is to be recharged through a 20 V source. (a) show by means of a diagram the connection of the circuit elements. (b) What is the current in the circuit? (c) The recharging current is to be limited to 3A. What is the value of the limiting resistor? 5. Three identical batteries are available. When the three batteries are in series, the terminal voltage of the system is 15 V when supplying 6 A. When reconnected in parallel, the terminal voltage of the system drops to 6 V when supplying current to the same resistor as before. Determined the current supplied by the parallel system, the emf and the internal resistance of each batter. 6. A 12 V generator has an internal resistance of 0.05 ohm. Two loads are connected in parallel to its terminals, one drawing a 12 A current and the other dissipating energy at the rate of 200 W. What is the terminal voltage of the generator with this load?
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