Problem 1FTD: Are household electrical outlets connected in series or parallel? How do you know? Problem 2FTD: All the resistors in Fig. 25.24 have the same resistance. In which circuits does the battery supply... Problem 3FTD: Can the voltage across a batterys terminals differ from the batterys rated voltage? Explain. Problem 4FTD: Can the voltage across a batterys terminals he higher than the batterys rated voltage? Explain. Problem 5FTD: In some cities, streetlights are wired in such a way that when one burns out, they all go out. Are... Problem 6FTD: When the switch in Fig. 25.25 is open, whats the voltage across the resistor? Across the switch?... Problem 7FTD: Two identical resistors in series dissipate equal power. How can this be, when electric charge loses... Problem 8FTD: When a large electric load such as a washing machine or oven comes on, lights throughout a house... Problem 9FTD: How would you connect a pair of equal resistors across an ideal battery in order to get the greatest... Problem 10FTD: You have a battery whose voltage and internal resistance are unknown. Using an ideal voltmeter and... Problem 11FTD: A student whos confused about voltage and current hooks nearly ideal ammeter across a car battery.... Problem 12FTD: A student whos confused about voltage and current tries to measure the voltage across a lighted... Problem 13E: Sketch a circuit diagram for a circuit that includes a resistor R1 connected to the positive... Problem 14E: Sketch a diagram for a circuit consisting of two batteries, a resistor, and a capacitor, all in... Problem 15E: Resistors R1 and R2 are in series, and the series combination is in parallel with R3. This parallel... Problem 16E: Whats the emf of a battery that delivers 27 J of energy as it moves 3.0 C between its terminals? Problem 17E: 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 18E: If you accidentally leave your car headlights (current 5 A) on for an hour, how much energy drains... Problem 19E: A 47-k resistor and a 39-k resistor are in parallel, and the pair is in series with a 22-k resistor.... Problem 20E: What resistance should you place in parallel with a 56-k resistor to make an equivalent resistance... Problem 21E: A defective starter motor draws 300 A from a cars 12-V battery, dropping the battery terminal... Problem 22E: Find the internal resistance of the battery in Exercise 21. Problem 23E: When a 9-V battery is temporarily short-circuited, a 200-mA current flows. Whats the batterys... Problem 24E: You have a 1.0-, a 2.0-, and a 3.0- resistor. What equivalent resistances can you form using all... 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: Find all three currents in the circuit of Fig. 25.13, but now with 2= 1.0 V. FIGURE 25.13 Example... Problem 28E Problem 29E: An ammeter with 100- resistance is inserted in the circuit of Fig. 25.27. By what percentage is the... Problem 30E: A new mechanic foolishly connects an ammeter with 0.1- resistance directly across a 12-V car battery... Problem 31E: Show that the quantity RC has the units of time (seconds). Problem 32E: If capacitance is in F, what will he the units of the time constant RC when resistance is in (a) ,... Problem 33E: Show that a capacitor is charged to approximately 99% of the applied voltage in five time constants... Problem 34E: An uncharged 10-F capacitor and a 470-k resistor are in series, and 250 V is applied across the... Problem 35E: Find an expression for the voltage across the capacitor in Example 25.6 when its fully charged. Problem 36P: In Fig. 25.28, all resistors have the same value, R. What will be the resistance measured (a)... Problem 37P: In Fig. 25.28, take all resistors to be 1 k Find the current in the vertical resistor when a 6.0-V... Problem 38P: Three 1.5-V batteries, with internal resistances 0.01 ,0.1 , and 1 , each have 1- resistors... Problem 39P: A partially discharged car battery can be modeled as a 9-V emf in series with a 0.08- internal... Problem 40P: Your company is overstocked on 50- , 12-W resistors. Your project requires 50- resistors that can be... Problem 41P Problem 42P: How many 100-W, 120-V lightbulbs can be connected in parallel before they trip a 20-A circuit... Problem 43P: You company is designing a battery-based backup power source, and your job is to assess its safety.... Problem 44P: Take = 12 V and R1 = 270 in Fig. 25.4. (a) Whats the resistance R2 if theres 4.5 V across it? (b)... Problem 45P: In Fig. 25.29, R1 is a variable resistor and the other two resistors have equal resistances R. (a)... Problem 46P: In the circuit of Fig. 25.30, find (a) the current supplied by the battery and (b) the current... Problem 47P: In Fig. 25.30, how much power is dissipated in the 4- resistor? FIGURE 25.30 Problems 46 and 47 Problem 48P: Whats the ammeter reading in Fig. 25.31? FIGURE 25.31 Problem 48 Problem 49P: In Fig. 25.32, find the equivalent resistance measured between A and B. FIGURE 25.32 Problem 49 Problem 50P: Find all three currents in the circuit of Fig. 25.13 with the values given, but with battery 2... Problem 51P: The voltage across the 30-k resistor in Fig. 25.33 is measured with (a) a 50-k voltmeter, (b) a... Problem 52P: In Fig. 25.34, what are the meter readings when an ideal (a) voltmeter or (b) ammeter is connected... Problem 53P: A resistor draws 1.00 A from an ideal 12.0-V battery, (a) If an ammeter with 0.10- resistance is... Problem 54P: The voltage across a charging capacitor in an RC circuit rises to 1 1/e of the battery voltage in... Problem 55P: Youre designing an external defibrillator that discharges a capacitor through the patients body,... Problem 56P: A capacitor is charged until it holds 5.0 J of energy, then connected across a 10-k resistor. In 8.6... Problem 57P: A capacitor is charged until it holds 5.0 J of energy, then connected across a 10-k resistor. In 8.6... Problem 58P: In Fig. 25.35 the 2.0-F capacitor is charged to 150 V, while the 1.0-F capacitor is initially... Problem 59P: For the circuit of Example 25.6, take = 100 V, R1, = 4.0 k, and R2 = 6.0k, and assume the capacitor... Problem 60P: In Fig. 25.36, the switch is initially open and both capacitors are initially uncharged. All... Problem 61P Problem 62P: An ammeter with resistance 1.42 is connected momentarily across a battery, and the meter reads 9.78... Problem 63P: 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 64P: With all values except 2 as given in the preceding problem, (a) find 2 such that there is no current... Problem 65P: The voltage on a charged capacitor is monitored with a voltmeter whose resistance is 1.00 M. The... Problem 66P: Find the resistance needed in an RC circuit to bring a 20-f capacitor from zero charge to 45% charge... Problem 67P: Suppose the currents into and out of a circuit node differ by 1 A. If the node consists of a small... Problem 68P: Show that a battery delivers the most power when the load resistance across its terminals is equal... Problem 69P: Youre writing the instruction manual for a stereo amplifier with a maximum output of 100 W. The... Problem 70P: Show that only half the total energy drawn from a battery in charging an RC circuit ends up stored... Problem 71P: Find the equivalent resistance between A and B for the circuits Fig. 25.38. FIGURE 25.38 Problem 71 Problem 72P Problem 73P: Obtain an expression for the rate of increase (dV/dt) of the voltage across a charging capacitor in... Problem 74P: The circuit in Fig. 25.39 extends forever to the right, and all the resistors have the same value R.... Problem 75P: Figure 25.40 on the next page shows the voltage across a capacitor thats charging through a 4700-... Problem 76P: Figure 25.41 shows a portion of a circuit used to model muscle cells and neurons. All resistors have... Problem 77P: An electrochemical impulse traveling along the cell modeled in Fig. 25.41 changes the value of 3 so... Problem 78P: A parallel-plate capacitor has plates of area 10cm2 separated by a 0.10-nun layer of glass... Problem 79P: Write the node and loop equations for the circuit in Fig. 25.23a (Example 25.6), and find the time... Problem 80P: In Problem 60, take C1 = C2 = C, and find the current through R2 as a function of time. (Hint: Use... Problem 81P: Youre about to purchase a battery. Normally, batteries are rated in ampere-hoursthe total charge... Problem 82P: In the circuit of Fig. 25.42 the switch is initially open and the capacitor is uncharged. Find... Problem 83PP: BIO Stray voltage is a serious problem on dairy farms, often resulting from corroded wiring or poor... 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... format_list_bulleted