Physics for Scientists and Engineers with Modern Physics, Technology Update
9th Edition
ISBN: 9781305401969
Author: SERWAY, Raymond A.; Jewett, John W.
Publisher: Cengage Learning
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Chapter 28, Problem 59AP
To determine
The efficiency of the battery as an energy storage device.
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Each of the six real batteries in the figure has an emf of 18.6 V and a resistance of 3.89 0. (a) What is the current through the (external)
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does each battery transfer energy to internal thermal energy?
(a) Number
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IM
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Units
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An electrical power line, having a total resistance of 2Ω, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately:
Chapter 28 Solutions
Physics for Scientists and Engineers with Modern Physics, Technology Update
Ch. 28.1 - To maximize the percentage of the power from the...Ch. 28.2 - With the switch in the circuit of Figure 27.4a...Ch. 28.2 - With the switch in the circuit of Figure 27.6a...Ch. 28.2 - Prob. 28.4QQCh. 28.4 - Consider the circuit in Figure 27.17 and assume...Ch. 28 - Prob. 1OQCh. 28 - Prob. 2OQCh. 28 - Prob. 3OQCh. 28 - Prob. 4OQCh. 28 - Prob. 5OQ
Ch. 28 - Prob. 6OQCh. 28 - Prob. 7OQCh. 28 - Prob. 8OQCh. 28 - Prob. 9OQCh. 28 - Prob. 10OQCh. 28 - Prob. 11OQCh. 28 - Prob. 12OQCh. 28 - Prob. 13OQCh. 28 - Prob. 14OQCh. 28 - Prob. 15OQCh. 28 - Prob. 1CQCh. 28 - Prob. 2CQCh. 28 - Why is it possible for a bird to sit on a...Ch. 28 - Prob. 4CQCh. 28 - Prob. 5CQCh. 28 - Prob. 6CQCh. 28 - Prob. 7CQCh. 28 - Prob. 8CQCh. 28 - Is the direction of current in a battery always...Ch. 28 - Prob. 10CQCh. 28 - Prob. 1PCh. 28 - Two 1.50-V batterieswith their positive terminals...Ch. 28 - An automobile battery has an emf of 12.6 V and an...Ch. 28 - Prob. 4PCh. 28 - Prob. 5PCh. 28 - Prob. 6PCh. 28 - Prob. 7PCh. 28 - Prob. 8PCh. 28 - Prob. 9PCh. 28 - Prob. 10PCh. 28 - Prob. 11PCh. 28 - Prob. 12PCh. 28 - Prob. 13PCh. 28 - Prob. 14PCh. 28 - Prob. 15PCh. 28 - Prob. 16PCh. 28 - Prob. 17PCh. 28 - Prob. 18PCh. 28 - Prob. 19PCh. 28 - Why is the following situation impossible? A...Ch. 28 - Prob. 21PCh. 28 - Prob. 22PCh. 28 - Prob. 23PCh. 28 - Prob. 24PCh. 28 - Prob. 25PCh. 28 - The following equations describe an electric...Ch. 28 - Prob. 27PCh. 28 - Prob. 28PCh. 28 - Prob. 29PCh. 28 - Prob. 30PCh. 28 - Prob. 31PCh. 28 - Prob. 32PCh. 28 - Prob. 33PCh. 28 - Prob. 34PCh. 28 - Prob. 35PCh. 28 - Prob. 36PCh. 28 - An uncharged capacitor and a resistor are...Ch. 28 - Prob. 38PCh. 28 - Prob. 39PCh. 28 - A 10.0-F capacitor is charged by a 10.0-V battery...Ch. 28 - Prob. 41PCh. 28 - Prob. 42PCh. 28 - Prob. 43PCh. 28 - Prob. 44PCh. 28 - A charged capacitor is connected to a resistor and...Ch. 28 - Prob. 46PCh. 28 - Prob. 47PCh. 28 - Prob. 48PCh. 28 - Prob. 49APCh. 28 - Prob. 50APCh. 28 - Prob. 51APCh. 28 - Prob. 52APCh. 28 - Prob. 53APCh. 28 - Prob. 54APCh. 28 - Prob. 55APCh. 28 - Prob. 56APCh. 28 - Prob. 57APCh. 28 - Why is the following situation impossible? A...Ch. 28 - Prob. 59APCh. 28 - Prob. 60APCh. 28 - When two unknown resistors are connected in series...Ch. 28 - Prob. 62APCh. 28 - Prob. 63APCh. 28 - A power supply has an open-circuit voltage of 40.0...Ch. 28 - Prob. 65APCh. 28 - Prob. 66APCh. 28 - Prob. 67APCh. 28 - Prob. 68APCh. 28 - Prob. 69APCh. 28 - Prob. 70APCh. 28 - Prob. 71APCh. 28 - Prob. 72APCh. 28 - A regular tetrahedron is a pyramid with a...Ch. 28 - An ideal voltmeter connected across a certain...Ch. 28 - Prob. 75APCh. 28 - Prob. 76APCh. 28 - Prob. 77APCh. 28 - Prob. 78APCh. 28 - Prob. 79APCh. 28 - Prob. 80APCh. 28 - Prob. 81APCh. 28 - Prob. 82CPCh. 28 - Prob. 83CP
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- Each of the six real batteries in the figure has an emf of 18.6 V and a resistance of 3.89 0. (a) What is the current through the (external) resistance R=3.51 Q? (b) What is the potential difference across each battery? (c) What is the power of each battery? (d) At what rate does each battery transfer energy to internal thermal energy? (a) Number (b) Number (c) Number (d) Number M. P rod Units A Units V Units W Units W R >arrow_forwardA resistor of resistance R is supplied by a battery which consists of voltage source E in series with an internal resistance r. Plot the power P as a function of resistance R for 2 Ω < R < 20 Ω given that E = 24 V and r = 4.5 Ω. When does maximum power transfer occur?arrow_forwardIn a circuit, all the power delivered by the battery must be dissipated by the elements to the circuit. This is simply a statement of the conservation of energy. How much energy dissipated depends on the resistance of the element and the voltage across the resistor, or the current through it. The relevant equations for the problems are as follows. For a circuit element, the power dissipated (or generated) is P = IV, where Vand I are the voltage across and current through a circuit element. We know that a resistor obeys OhmA ¢A^A^'s Law V=IR, which means that for a resistor, the power dissipated is P = I*R = V²/R. Consider the following two circuits with identical batteries and re- sistors. А В C R R R RS R If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit B? If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit C?arrow_forward
- The RC charging circuit in a camera flash unit has a voltage source of 295 V and a capacitance of 126 µF. HINT Apply the expression q = Q(1 - e-t/RC). Click the hint button again to remove this hint. (a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 14.2 s. (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.14 ms. Aarrow_forwardA battery has an emf of 26.6 V. The terminal voltage of the battery is 9.29 V when it is delivering 58 W of power to an external load resistor R.What is the internal resistance (in Ω) of the battery? (Answer in 2 decimal places)arrow_forwardA battery with an emf of 24 V and unknown internal resistance r is connected to a 6.0 W load resistor RL such that a current of 3.0 A flows through the load resistor. The output voltage of the battery (terminal voltage) is:arrow_forward
- The starter in your car is a device of fixed resistance that is designed to operate at a power of 847 W when connected to a fresh 12.0 V car battery, but is able to function at a power as low as 612 W when the battery is weaker. Your car battery is several years old, and one morning you are unable to start the vehicle. You check the battery's voltage, and find a value of 10.6 V when the ignition is in the off position. You have a friend try to start the vehicle, and as the engine turns over, the voltage of the battery drops to 7.83 V. What is the internal resistance of the battery?arrow_forwardA capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having a total internal resistance of 3.40 MO. After a time of 4.00 s the voltmeter reads 3.0 V. What are (a) the capacitance and (b) the time constant of the circuit?arrow_forwardA 12.0 V emf automobile battery has a terminal voltage of 16.8 V when being charged by a current of 11.0 A. (a) What is the battery's internal resistance (in N)? Ω (b) What power (in W) is dissipated inside the battery? W (c) At what rate (in °C/min) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.380 kcal/(kg · °C), assuming no heat escapes? °C/minarrow_forward
- A flash unit for a camera has a capacitance of 1700 μF. What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in 21 s?arrow_forwardA storage battery has an emf of 6.7 V and internal resistance of 0.50. Compute for the terminal voltage of the battery when it is being charged with 2.0 A.arrow_forwardThe figure below shows an electrical circuit consisting of nine resistors (all multiples of R=5.00) connected to an ideal 12V fem 3 source. (a) Calculate the equivalent resistance of the circuit and the power it dissipates. (b) Find the electrical current flowing through each resistor. (c) Calculate the potential difference and the power dissipated through each resistor. (d) Compare the powers dissipated by the entire circuit and each resistor.arrow_forward
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