Problem 1FTD: Are household electrical outlets connected in series or parallel? How do you know? Problem 2FTD: Can the voltage across a batterys terminals differ from the batterys rated voltage? Explain. Problem 3FTD: Can the voltage across a batterys terminals he higher than the batterys rated voltage? Explain. Problem 4FTD: When the switch in Fig. 25.25 is open, whats the voltage across the resistor? Across the switch?... Problem 5FTD: Two identical resistors in series dissipate equal power. How can this be, when electric charge loses... Problem 6FTD: When a large electric load such as a washing machine or oven comes on, lights throughout a house... Problem 7FTD: How would you connect a pair of equal resistors across an ideal battery in order to get the greatest... Problem 8FTD: You have a battery whose voltage and internal resistance are unknown. Using an ideal voltmeter and... Problem 9FTD: A student whos confused about voltage and current hooks nearly ideal ammeter across a car battery.... Problem 10FTD: A student whos confused about voltage and current tries to measure the voltage across a lighted... Problem 11E: Sketch a circuit diagram for a circuit that includes a resistor R1 connected to the positive... Problem 12E: Sketch a diagram for a circuit consisting of two batteries, a resistor, and a capacitor, all in... Problem 13E: Resistors R1 and R2 are in series, and the series combination is in parallel with R3. This parallel... Problem 14E: Whats the emf of a battery that delivers 27 J of energy as it moves 3.0 C between its terminals? Problem 15E: A 1.5-V battery stores 4.5 kJ of energy. How long can it light a flashlight bulb that draws 0.60 A? Problem 16E: If you accidentally leave your car headlights (current 5 A) on for an hour, how much energy drains... Problem 17E: A 47-k resistor and a 39-k resistor are in parallel, and the pair is in series with a 22-k resistor.... Problem 18E: What resistance should you place in parallel with a 56-k resistor to make an equivalent resistance... Problem 19E: A defective starter motor draws 285 A from a car's 12.6-V battery. dropping the voltage at the... Problem 20E: Find the internal resistance of the battery in Exercise 21. Problem 21E: When a 9-V battery is temporarily short-circuited, a 200-mA current flows. Whats the batterys... Problem 22E: You have a 1.0-, a 2.0-, and a 3.0- resistor. What equivalent resistances can you form using all... Problem 23E: Find all three currents in the circuit of Fig. 25.13, but now with 2 = 1.0 V. FIGURE 25.13 Example... Problem 24E Problem 25E: Find all three currents in the circuit of Fig. 25.13, but now with 2= 1.0 V. FIGURE 25.13 Example... Problem 26E Problem 27E: An ammeter with 100- resistance is inserted in the circuit of Fig. 25.27. By what percentage is the... Problem 28E: A new mechanic foolishly connects an ammeter with 0.1- resistance directly across a 12-V car battery... Problem 29E: Show that the quantity RC has the units of time (seconds). Problem 30E: If capacitance is in F, what will he the units of the time constant RC when resistance is in (a) ,... Problem 31E: Show that a capacitor is charged to approximately 99% of the applied voltage in five time constants... Problem 32E: An uncharged 10-F capacitor and a 470-k resistor are in series, and 250 V is applied across the... Problem 33E: Find an expression for the voltage across the capacitor in Example 25.6 when its fully charged. Problem 34E: Rework Example 25.3. changing the 4.0- Ω resistor to a 2.0- Ω resistor.
Problem 35E: Example 25.3: In the circuit of Example 25.3, take the battery voltage to be an unknown. If the... Problem 36E: Example 25.3: In Fig. 25.27, take R1 = R2 = 33.0 Ω and R3 = 47.0 Ω. Find the voltage across R3 when... Problem 37E: Example 25.3 In Fig. 25.27, take R1 = 220 Ω, R2 = 180 Ω, and R3 = 68 Ω. If an ideal 9.0-V battery is... Problem 38E: A professional-grade camera flash gets its energy from a 1500-μF capacitor and requires 210 V to... Problem 39E: You're reengieering the camera flash of the preceding problem to shorten the time between flashes.... Problem 40E: Defibrillators restore normal heart rhythm by giving the heart a sudden jolt of electrical energy.... Problem 41E: Example 25.5: You’re designing a defibrillator as described in the preceding problem. You’re working... Problem 42P: In Fig. 25.28, all resistors have the same value, R. What will be the resistance measured (a)... Problem 43P: In Fig. 25.28, take all resistors to be 1 k Find the current in the vertical resistor when a 6.0-V... Problem 44P: Three 1.5-V batteries, with internal resistances 0.01 ,0.1 , and 1 , each have 1- resistors... Problem 45P Problem 46P: You company is designing a battery-based backup power source, and your job is to assess its safety.... Problem 47P: In the circuit of Fig. 25.30, find (a) the current supplied by the battery and (b) the current... Problem 49P: In Fig. 25.30, how much power is dissipated in the 4- resistor? FIGURE 25.30 Problems 46 and 47 Problem 50P: Whats the ammeter reading in Fig. 25.31? FIGURE 25.31 Problem 48 Problem 51P: Find all three currents in the circuit of Fig. 25.13 with the values given, but with battery 2... Problem 52P: In Example 25.4. ε2, is taken to be +9 V in the configuration shown in Fig. 25.13a. In the preceding... Problem 53P: The voltage across the 30-k resistor in Fig. 25.33 is measured with (a) a 50-k voltmeter, (b) a... Problem 54P: In Fig. 25.34, what are the meter readings when an ideal (a) voltmeter or (b) ammeter is connected... Problem 55P Problem 56P: The voltage across a charging capacitor in an RC circuit rises to 1 1/e of the battery voltage in... Problem 57P: Youre designing an external defibrillator that discharges a capacitor through the patients body,... Problem 58P: A capacitor is charged until it holds 5.0 J of energy, then connected across a 10-k resistor. In 8.6... Problem 59P: A capacitor is charged until it holds 5.0 J of energy, then connected across a 10-k resistor. In 8.6... Problem 60P: In Fig. 25.35 the 2.0-F capacitor is charged to 150 V, while the 1.0-F capacitor is initially... Problem 61P: For the circuit of Example 25.6, take = 100 V, R1, = 4.0 k, and R2 = 6.0k, and assume the capacitor... Problem 62P: In Fig. 25.36, the switch is initially open and both capacitors are initially uncharged. All... Problem 63P Problem 64P: An ammeter with resistance 1.42 is connected momentarily across a battery, and the meter reads 9.78... Problem 65P: In Fig. 25.37, take 1 = 12.0 V, 2 = 6.00 V, 3 = 3.00V, R1 = 1.00 , R2 = 2.00 , and R3 = 4.00 . Find... Problem 66P: With all values except 2 as given in the preceding problem, (a) find 2 such that there is no current... Problem 67P: The voltage on a charged capacitor is monitored with a voltmeter whose resistance is 1.00 M. The... Problem 68P: Find the resistance needed in an RC circuit to bring a 20-f capacitor from zero charge to 45% charge... Problem 69P: Suppose the currents into and out of a circuit node differ by 1 A. If the node consists of a small... Problem 70P: Show that a battery delivers the most power when the load resistance across its terminals is equal... Problem 71P: Youre writing the instruction manual for a stereo amplifier with a maximum output of 100 W. The... Problem 72P: Show that only half the total energy drawn from a battery in charging an RC circuit ends up stored... Problem 73P: Find the equivalent resistance between A and B for the circuits Fig. 25.38. FIGURE 25.38 Problem 71 Problem 74P Problem 75P: Obtain an expression for the rate of increase (dV/dt) of the voltage across a charging capacitor in... Problem 76P: The circuit in Fig. 25.39 extends forever to the right, and all the resistors have the same value R.... Problem 77P: Figure 25.40 on the next page shows the voltage across a capacitor thats charging through a 4700-... Problem 78P: Figure 25.41 shows a portion of a circuit used to model muscle cells and neurons. All resistors have... Problem 79P: An electrochemical impulse traveling along the cell modeled in Fig. 25.41 changes the value of 3 so... Problem 80P: In Fig. 25.27, take R1 = 47 Ω and R2 = 150 Ω. Suppose on ideal 24-V battery is connected across... Problem 81P: Write the node and loop equations for the circuit in Fig. 25.23a (Example 25.6), and find the time... Problem 82P: Youre about to purchase a battery. Normally, batteries are rated in ampere-hoursthe total charge... Problem 83P: In the circuit of Fig. 25.42 the switch is initially open and the capacitor is uncharged. Find... Problem 84PP: BIO Stray voltage is a serious problem on dairy farms, often resulting from corroded wiring or poor... Problem 85PP: BIO Stray voltage is a serious problem on dairy farms, often resulting from corroded wiring or poor... Problem 86PP: BIO Stray voltage is a serious problem on dairy farms, often resulting from corroded wiring or poor... Problem 87PP: BIO Stray voltage is a serious problem on dairy farms, often resulting from corroded wiring or poor... format_list_bulleted