(I) Calculate the current in the circuit of Fig. 19-53, and show that the sum of all the voltage changes around the circuit is zero. FIGURE 19-53 Problem 25. 9.5 Ω r = 2.092 www. 9.0 V www 14.0 Ω
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- (I) Calculate the current in the circuit of Fig. 19–53, and show that the sum of all the r= 2.0 2 voltage changes around the circuit is zero. 9.0 V 9.5 Q FIGURE 19–53 Problem 25. 14.0 2(II) For the circuit shown in Fig. 19–55, find the potential difference between points a and b. Each resistor has R R = 160 N and each bat- tery is 1.5 V. a 1.5 V• R: R R 1.5 V FIGURE 19-55 Problem 27. b(III) When the resistor R in Fig. 19-73 is 35 N, the high- resistance voltmeter reads 9.7 V. When R is replaced by a 14.0-N resistor, the voltmeter reading drops to 8.1 V. What are the emf and V internal resistance of the battery? ww R FIGURE 19–73 Problem 66.
- (III) (a) Determine the currents I, 1,, and Iz in Fig. 19–61. Assume the internal resistance of each battery is r = 1.0 N. (b) What is the terminal voltage of the 6.0-V battery? 12.0 V 22 Ω 12 2 28 Ω |12.0 V 11Ω 16 2 FIGURE 19–61 Problems 34 and 35. 6.0 V I3 ww- (III) (a) A network of five equal resistors R is connected to a battery & as shown in Fig. 19–60. Determine the current I that flows out of the R battery. (b) Use the value determined for I to find the wwww W R ww single resistor Req that is equivalent R R to the five-resistor R network. FIGURE 19-60 Problem 33.(II) What is the net resistance of the circuit connected to the battery in Fig. 19–50? R R C ww B ww R V R FIGURE 19-50 R A Problems 19 and 20. ww
- Which resistors in Fig. 19–41 are connected in parallel? (a) All three. (b) Rị and R2. (c) R2 and R3. (d) Rị and R3. (e) None of the above. R1 R2 FIGURE 19–41 R3 MisConceptual Question 2.15 - In the circuit shown in the figure, the ammeter and voltmeter are ideal. If e = 4V, R = 9N and r = 1N, then readings of ammeter and voltmeter are... V R R wwww ww E,r A a) 1 А, 4V b) 2 А, 3 V c) O A, 4 V d) 1 А, ЗV e) 4 А, 4 V Boş bırak(II) The RC circuit of Fig. 19–70 (same as Fig. 19–21a) has R = 8.7 kN and C = 3.0 µF. The capacitor is at voltage Vo at t = 0, when the switch is closed. How long does it take the capacitor to discharge to 0.25% of its initial voltage? R FIGURE 19–70 Problem 56.
- 5. Where in the circuit of Fig. 18–33 is the current the largest, (a), (b), (c), or (d)? Or (e) it is the same at all points? (c) |(b) FIGURE 18-33 + 1.5 V (a) MisConceptual Question 5. (d)A flashlight bulb rated at 2.0 W and 3.0 V is operated by a 9.0-V battery. To light the bulb at its rated voltage and power, a resistor R is connected in series as shown in Fig. 19–85. What value should the resistor have? R FIGURE 19-85 Problem 87. 9.0 V1. In which circuits shown in Fig. 19–40 are resistors connected in series? (a) (b) w ww (c) (d) FIGURE 19-40 MisConceptual Question 1.