Problem Q26.1DQ: In which 120-V light bulb does the filament have greater resistance: a 60-W bulb or a 120-W bulb? If... Problem Q26.2DQ: Two 120-V light bulbs, one 25-W and one 200-W, were connected in series across a 240-V line. It... Problem Q26.3DQ: You connect a number of identical light bulbs to a flashlight battery, (a) What happens to the... Problem Q26.4DQ: In the circuit shown in Fig. Q26.4, three identical light bulbs are connected to a flashlight... Problem Q26.5DQ: If two resistors R1 and R2 (R2 R1) are connected in series as shown in Fig. Q26.5, which of the... Problem Q26.6DQ: If two resistors R1 and R2 (R2 R1) are connected in parallel as shown in Fig. Q26.6, which of the... Problem Q26.7DQ: A battery with no internal resistance is connected across identical light bulbs as shown in Fig.... Problem Q26.8DQ: A resistor consists of three identical metal strips connected as shown in Fig. Q26.8. If one of the... Problem Q26.9DQ: A light bulb is connected in the circuit shown in Fig. Q26.9. If we close the switch S, does the... Problem Q26.10DQ: A real battery, having nonnegligible internal resistance, is connected across a light bulb as shown... Problem Q26.11DQ: If the battery in Discussion Question Q26.10 is ideal with no internal resistance, what will happen... Problem Q26.12DQ: Consider the circuit shown in Fig. Q26.12. What happens to the brightnesses of the bulbs when the... Problem Q26.13DQ: Is it possible to connect resistors together in a way that cannot be reduced to some combination of... Problem Q26.14DQ: The battery in the circuit shown in Fig. Q26.14 has no internal resistance. After you close the... Problem Q26.15DQ: In a two-cell flashlight, the batteries are usually connected in series. Why not connect them in... Problem Q26.16DQ: Identical light bulbs A, B, and C are connected as shown in Fig. Q26.16. When the switch S is... Problem Q26.17DQ: The emf of a flashlight battery is roughly constant with time, but its internal resistance increases... Problem Q26.18DQ: Will the capacitors in the circuits shown in Fig. Q26.18 charge at the same rate when the switch S... Problem Q26.19DQ: Verify that the time constant RC has units of time. Problem Q26.20DQ: For very large resistances it is easy to construct R-C circuits that have time constants of several... Problem Q26.21DQ: When a capacitor, battery, and resistor are connected in series, does the resistor affect the... Problem 26.1E: A uniform wire of resistance R is cut into three equal lengths. One of these is formed into a circle... Problem 26.2E: A machine part has a resistor X protruding from an opening in the side. This resistor is connected... Problem 26.3E: A resistor with R1 = 25.0 is connected to a battery that has negligible internal resistance and... Problem 26.4E: A 42- resistor and a 20- resistor are connected in parallel, and the combination is connected across... Problem 26.5E: A triangular array of resistors is shown in Fig. E26.5. What current will this array draw from a... Problem 26.6E: For the circuit shown in Fig. E26.6 both meters are idealized, the battery has no appreciable... Problem 26.7E: For the circuit shown in Fig. E26.7 find the reading of the idealized ammeter if the battery has an... Problem 26.8E: Three resistors having resistances of 1.60 , 2.40 , and 4.80 are connected in parallel to a 28.0-V... Problem 26.9E: Now the three resistors of Exercise 26.8 are connected in series to the same battery. Answer the... Problem 26.10E: Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can... Problem 26.11E: In Fig. E26.11, R1, = 3.00 , R2 = 6.00 , and R3= 5.00 . The battery has negligible internal... Problem 26.12E: In Fig. E26.11 the battery has emf 35.0 V and negligible internal resistance. R1 = 5.00 . The... Problem 26.13E: Compute the equivalent resistance of the network in Fig. E26.13, and find the current in each... Problem 26.14E: Compute the equivalent resistance of the network in Fig. E26.14, and find the current in each... Problem 26.15E: In the circuit of Fig. E26.15, each resistor represents a light bulb. Let R1, = R2 = R3 = R4 = 4.50 ... Problem 26.16E: Consider the circuit shown in Fig. E26.16. The current through the 6.00- resistor is 4.00 A. in the... Problem 26.17E: In the circuit shown in Fig. E26.17, the voltage across the 2.00- resistor is 12.0 V. What are the... Problem 26.18E: In the circuit shown in Fig. E26.18, = 36.0 V, R1, = 4.00 , R2 = 6.00 , and R3 = 3.00 , (a) What is... Problem 26.19E: CP In the circuit in Fig. E26.19, a 20.0- resistor is inside 100 g of pure water that is surrounded... Problem 26.20E: In the circuit shown in Fig. E26.20, the rate at which R1 is dissipating electrical energy is 15.0... Problem 26.21E: Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400 and 800 .... Problem 26.22E: Light Bulbs in Series. A 60-W, 120-V light bulb and a 200-W, 120-V light bulb are connected in... Problem 26.23E: In the circuit shown in Fig. E26.23, ammeter A1 reads 10.0 A and the batteries have no appreciable... Problem 26.24E: The batteries shown in the circuit in Fig. E26.24 have negligibly small internal resistances. Find... Problem 26.25E: In the circuit shown in Fig. E26.25 find (a) the current in resistor R; (b) the resistance R; (c)... Problem 26.26E: Find the emfs 1 and 2 in the circuit of Fig. E26.26, and find the potential difference of point b... Problem 26.27E: In the circuit shown in Fig. E26.27, find (a) the current in the 3.00- resistor; (b) the unknown... Problem 26.28E: In the circuit shown in Fig. E26.28, find (a) the current in each branch and (b) the potential... Problem 26.29E: The 10.00-V battery in Fig. E26.28 is removed from the circuit and reinserted with the opposite... Problem 26.30E: The 5.00-V battery in Fig. E26.28 is removed from the circuit and replaced by a 15.00-V battery,... Problem 26.31E: In the circuit shown in Fig. E26.31 the batteries have negligible internal resistance and the meters... Problem 26.32E: In the circuit shown in Fig. E26.32 both batteries have insignificant internal resistance and the... Problem 26.33E: In the circuit shown in Fig. E26.33 all meters are idealized and the batteries have no appreciable... Problem 26.34E: In the circuit shown in Fig. E26.34, the 6.0- resistor is consuming energy at a rate of 24 J/s when... Problem 26.35E: The resistance of a galvanometer coil is 25.0 , and the current required for full-scale deflection... Problem 26.36E: The resistance of the coil of a pivoted coil galvanometer is 9.36 , and a current of 0.0224 A causes... Problem 26.37E: A circuit consists of a series combination of 6.00-k and 5.00-k resistors connected across a 50.0-V... Problem 26.38E: A galvanometer having a resistance of 25.0 has a 1.00- shunt resistance installed to convert it to... Problem 26.39E: A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an... Problem 26.40E: You connect a battery, resistor, and capacitor as in Fig. 26.20a, where = 36.0 V, C = 5.00 F, and R... Problem 26.41E: A 4.60-F capacitor that is initially uncharged is connected in series with a 7.50-k resistor and an... Problem 26.42E: You connect a battery, resistor, and capacitor as in Fig. 26.20a, where R = 12.0 and C= 5.00 106F.... Problem 26.43E: CP In the circuit shown in Fig. E26.43 both capacitors are initially charged to 45.0 V. (a) How long... Problem 26.44E: A 12.4-F capacitor is connected through a 0.895-M resistor to a constant potential difference of... Problem 26.45E: An emf source with = 120 V, a resistor with R = 80.0 , and a capacitor with C = 4.00 F are... Problem 26.46E: A resistor and a capacitor are connected in series to an emf source. The time constant for the... Problem 26.47E: CP In the circuit shown in Fig. E26.47 each capacitor initially has a charge of magnitude 3.50 nC on... Problem 26.48E: A 1.50-F capacitor is charging through a 12.0- resistor using a 10.0-V battery. What will be the... Problem 26.49E: In the circuit in Fig. E26.49 the capacitors are initially uncharged, the battery has no internal... Problem 26.50E: A 12.0-F capacitor is charged to a potential of 50.0 V and then discharged through a 225- resistor.... Problem 26.51E: In the circuit shown in Fig. E26.51, C = 5.90 F, = 28.0 V. and the emf has negligible resistance.... Problem 26.52E Problem 26.53E: A 1500-W electric beater is plugged into the outlet of a 120-V circuit that has a 20-A circuit... Problem 26.54P: In Fig. P26.54, the battery has negligible internal resistance and = 48.0 V. R1 = R2 = 4.00 and R4... Problem 26.55P: The two identical light bulbs in Example 26.2 (Section 26.1) are connected in parallel to a... Problem 26.56P: Each of the three resistors in Fig. P26.56 has a resistance of 2.4 and can dissipate a maximum of... Problem 26.57P: (a) Find the potential of point a with respect to point b in Fig. P26.57. (b) If points a and b are... Problem 26.58P: CP For the circuit shown in Fig. P26.58 a 20.0- resistor is embedded in a large block of ice at... Problem 26.59P: Calculate the three currents I1, I2, and I3 indicated in the circuit diagram shown in Fig. P26.59.... Problem 26.60P: What must the emf in Fig. P26.60 be in order for the current through the 7.00- resistor to be 1.80... Problem 26.61P: Find the current through each of the three resistors of the circuit shown in Fig. P26.61. The emf... Problem 26.62P: (a) Find the current through the battery and each resistor in the circuit shown in Fig. P26.62. (b)... Problem 26.63P: Consider the circuit shown in Fig. P26.63. (a) What must the emf of the battery be in order for a... Problem 26.64P: In the circuit shown in Fig. P26.64, = 24.0 V, R1, = 6.00 , R3 = 12.0 , and R2 can vary between... Problem 26.65P: In the circuit shown in Fig. P26.65, the current in the 20.0-V battery is 5.00 A in the direction... Problem 26.66P: In the circuit shown in Fig. P26.66 all the resistors are rated at a maximum power of 2.00 W. What... Problem 26.67P: Figure P26.67 employs a convention often used in circuit diagrams. The battery (or other power... Problem 26.68P: Three identical resistors are connected in series. When a certain potential difference is applied... Problem 26.69P: A resistor R1 consumes electrical power P1 when connected to an emf . When resistor R2 is connected... Problem 26.70P: The capacitor in Fig. F26.70 is initially uncharged. The switch S is closed at t = 0. (a)... Problem 26.71P: A 2.00-F capacitor that is initially uncharged is connected in series with a 6.00-k resistor and an... Problem 26.72P: A 6.00-F capacitor that is initially uncharged is connected in series with a 5.00- resistor and an... Problem 26.73P: Point a in Fig. P26.73 is maintained at a constant potential of 400 V above ground. (See Problem... Problem 26.74P: The Wheatstone Bridge. The circuit shown in Fig. P26.74, called a Wheatstone bridge, is used to... Problem 26.75P: (See Problem 26.67.) (a) What is the potential of point a with respect to point b in Fig. P26.75... Problem 26.76P: A 2.36-F capacitor that is initially uncharged is connected in series with a 5.86- resistor and an... Problem 26.77P: A 224- resistor and a 589- resistor are connected in series across a 90.0-V line, (a) What is the... Problem 26.78P: A resistor with R = 850 is connected to the plates of a charged capacitor with capacitance C = 4.62... Problem 26.79P: A capacitor that is initially uncharged is connected in series with a resistor and an emf source... Problem 26.80P: DATA You set up the circuit shown in Fig. 26.22a, where R = 196 . You close the switch at time t = 0... Problem 26.81P: DATA You set up the circuit shown in Fig. 26.20. where C = 5.00 x 106F. At time t = 0. you close the... Problem 26.82P: DATA The electronics supply company where you work has two different resistors, R1 and R2, in its... Problem 26.83CP: An Infinite Network. As shown in Fig. P26.83, a network of resistors of resistances R1 and R2... Problem 26.84CP: Suppose a resistor R lies along each edge of a cube (12 resistors in all) with connections at the... Problem 26.85CP: BIO Attenuator Chains and Axons. The infinite network of resistors shown in Fig. P26.83 is known as... Problem 26.86PP: Assume that a typical open ion channel spanning an axons membrane has a resistance of 1 1011 . We... Problem 26.87PP: In a simple model of an axon conducting a nerve signal, ions move across the cell membrane through... Problem 26.88PP: Cell membranes across a wide variety of organisms have a capacitance per unit area of 1 F/cm2. For... format_list_bulleted