Two practical batteries are connected in series, such that the positive terminal of one battery is connected to the positive terminal of the other battery. Which of the following must be true? O A. When the series combination of batteries is connected to a load, the current will be uneven throughout the circuit. O B. The total internal resistance is equal to the sum of the individual internal resistances O C. When the series combination of batteries is connected to a load, both batteries will be discharging. O D. The total EMF is greater than the individual EMFS of the battery

Two practical batteries are connected in series, such that the positive terminal of one battery is connected to the positive terminal of the other battery. Which of the following must be true? O A. When the series combination of batteries is connected to a load, the current will be uneven throughout the circuit. O B. The total internal resistance is equal to the sum of the individual internal resistances O C. When the series combination of batteries is connected to a load, both batteries will be discharging. O D. The total EMF is greater than the individual EMFS of the battery

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

Section: Chapter Questions

Problem 1P: Two 1.50-V batterieswith their positive terminals in the same directionare inserted in series into a...

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A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?
A regular tetrahedron is a pyramid with a triangular base and triangular sides as shown in Figure P28.73. Imagine the six straight lines in Figure P28.73 are each 10.0- resistors, with junctions at the four vertices. A 12.0-V battery is connected to any two of the vertices. Find (a) the equivalent resistance of the tetrahedron between these vertices and (b) the current in the batten.
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Three 100- resistors are connected as shown in Figure P21.41 The maximum power that can safely be delivered to any one resistor is 25.0 W. (a) What is the maximum potential difference that can be applied to the terminals a and b? (b) For the voltage determined in part (a), what is the power delivered to each resistor? (c) What is the total power delivered to the combination of resistors?
The circuit shown in Figure P27.17 is connected for 2.00 min. (a) Determine the current in each branch of the circuit. (b) Find the energy delivered by each battery. (c) Find the energy delivered to each resistor. (d) Identify the type of energy storage transformation that occurs in the operation of the circuit. (e) Find the total amount of energy transformed into internal energy in the resistors.
Lightbulb A is marked 25.0 W 120. V, and lightbulb B is marked 100. W 120. V. These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120.-V source. (a) Find the resistance of each lightbulb. (b) During what time interval does 1.00 C pass into lightbulb A? (c) Is this charge different upon its exit versus its entry into the lightbulb? Explain. (d) In what time interval does 1.00 J pass into lightbulb A? (e) By what mechanisms does this energy enter and exit the lightbulb? Explain. (f) Find the cost of running lightbulb A continuously for 30.0 days, assuming the electric company sells its product at 0.110 per kWh.
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