Fundamentals of Physics, Volume 1, Chapter 1-20
10th Edition
ISBN: 9781118233764
Author: David Halliday
Publisher: WILEY
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Textbook Question
Chapter 27, Problem 71P
In Fig. 27-69, R1 = 20.0 Ω, R2 = 10.0 Ω, and the ideal battery has emf ℰ = 120 V. What is the current at point a if we close (a) only switch S1, (b) only switches S1 and S2, and (c) all three switches?
Figure 27-69 Problem 71.
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71 In Fig. 27-69, R¡ = 20.0 N, R,
10.0 2, and the ideal battery has emf
E = 120 V. What is the current at
point a if we close (a) only switch S1,
(b) only switches S, and S2, and (c) all
three switches?
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S3
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Figure 27-69 Problem 71.
*33 O In Fig. 27-44, the current in resistance 6 is i, = 1.40 A
and the resistances are R1 = R2 = R3 = 2.00 N, R, = 16.0N, R3 =
8.00 N, and R, = 4.00 2. What is the emf of the ideal battery?
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Figure 27-44 Problem 33.
95 In Fig. 27-79, E, = 6.00 V,
= 12.0 V, R = 100 0,
R, = 200 N, and R, = 300 N.
One point of the circuit is
grounded (V =
the (a) size and (b) direction
(up or down) of the current
through resistance 1, the (c)
size and (d) direction (left or
right) of the current through
resistance 2, and the (e) size
and (f) direction of the current
through resistance 3? (g) What
is the electric potential at point A?
0), What are
Chapter 27 Solutions
Fundamentals of Physics, Volume 1, Chapter 1-20
Ch. 27 - a In Fig. 27-18a, with R1R2, is the potential...Ch. 27 - a In Fig. 27-18a, are resistors R1 and R3 in...Ch. 27 - You are to connect resistors R1 and R2, with R1R2,...Ch. 27 - In Fig. 27-19, a circuit consists of a battery and...Ch. 27 - For each circuit in Fig 27-20, are the resistors...Ch. 27 - Res-monster maze. In Fig. 27-21, all the resistors...Ch. 27 - A resistor R1 is wired to a battery, then resistor...Ch. 27 - What is the equivalent resistance of three...Ch. 27 - Two resistors are wired to a battery. a In which...Ch. 27 - Cap-monster maze. In Fig. 27-22, all the...
Ch. 27 - Initially, a single resistor, R1 is wired to a...Ch. 27 - After the switch in Fig. 27-15 is closed on point...Ch. 27 - Figure 27-24 shows three sections of circuit that...Ch. 27 - SSM WWW In Fig. 27-25, the ideal batteries have...Ch. 27 - In Fig. 27-26, the ideal batteries have emfs 1 =...Ch. 27 - ILW A car battery with a 12 V emf and an internal...Ch. 27 - GO Figure 27-27 shows a circuit of four resistors...Ch. 27 - A 5.0 A current is set up in a circuit for 6.0 min...Ch. 27 - A standard flashlight battery can deliver about...Ch. 27 - A wire of resistance 5.0 is connected to a...Ch. 27 - A certain car battery with a 12.0 V emf has an...Ch. 27 - a In electron-volts, how much work does an ideal...Ch. 27 - a In Fig. 27-28, what value must R have if the...Ch. 27 - SSM In Fig. 27-29, circuit section AB absorbs...Ch. 27 - Figure 27-30 shows a resistor of resistance R =...Ch. 27 - A 10-km-long underground cable extends east to...Ch. 27 - GO In Fig. 27-32a, both batteries have emf = 1.20...Ch. 27 - ILW The current in a single-loop circuit with one...Ch. 27 - A solar cell generates a potential difference of...Ch. 27 - SSM In Fig. 27-33, battery 1 has emf 1 = 12.0 V...Ch. 27 - In Fig. 27-9, what is the potential difference Vd ...Ch. 27 - A total resistance of 3.00 is to be produced by...Ch. 27 - When resistors 1 and 2 are connected in series,...Ch. 27 - Prob. 21PCh. 27 - Figure 27-34 shows five 5.00 resistors. Find the...Ch. 27 - In Fig. 27-35, R1 = 100 , R2 = 50 , and the ideal...Ch. 27 - In Fig. 27-36, R1 = R2 = 4.00 and R3 = 2.50 ....Ch. 27 - SSM Nine copper wires of length l and diameter d...Ch. 27 - Figure 27-37 shows a battery connected across a...Ch. 27 - Side flash. Figure 27-38 indicates one reason no...Ch. 27 - The ideal battery in Fig. 27-39a has emf = 6.0 V....Ch. 27 - In Fig. 27-40, R1 = 6.00 , R2 = 18.0 , and the...Ch. 27 - GO In Fig. 27-41, the ideal batteries have emfs 1...Ch. 27 - SSMGO In Fig. 27-42, the ideal batteries have emfs...Ch. 27 - Both batteries in Fig. 27-43a are ideal. Emf 1 of...Ch. 27 - GO In Fig. 27-44. the current in resistance 6 is...Ch. 27 - The resistances in Figs. 27-45a and b are all 6.0...Ch. 27 - GO In Fig. 27-46, = 12.0 V, R1, = 2000 , R2 =...Ch. 27 - GO In Fig. 27-47, 1 = 6.00 V, 2 = 12.0 V, R1, =...Ch. 27 - In Fig. 27-48, the resistances are R1 = 2.00 , R2...Ch. 27 - Figure 27-49 shows a section of a circuit. The...Ch. 27 - GO In Fig. 27-50, two batteries with an emf =...Ch. 27 - GO Two identical batteries of emf = 12.0 V and...Ch. 27 - In Fig. 27-41, 1 = 3.00 V, 2 = 1.00 V, R1 = 4.00 ,...Ch. 27 - In Fig. 27-52, an array of n parallel resistors is...Ch. 27 - You are given a number of 10 resistors, each...Ch. 27 - GO In Fig. 27-53, R1 = 100 , R2 = R3 = 50.0 , R4 =...Ch. 27 - ILW In Fig. 27-54, the resistances are R1 = 1.0 ...Ch. 27 - In Fig. 27-55a, resistor 3 is a variable resistor...Ch. 27 - SSM A copper wire of radius a = 0.250 mm has an...Ch. 27 - GO In Fig. 27-53, the resistors have the values R1...Ch. 27 - ILW a In Fig. 27-56, what current does the ammeter...Ch. 27 - In Fig. 27-57, R1 = 2.00R, the ammeter resistance...Ch. 27 - In Fig. 27-58, a voltmeter of resistance Rv= 300 ...Ch. 27 - A simple ohmmeter is made by connecting a 1.50V...Ch. 27 - In Fig. 27-14, assume that = 3.0 V, r = 100 , R1 =...Ch. 27 - When the lights of a car are switched on, an...Ch. 27 - In Fig. 27-61, Rsis to be adjusted in value by...Ch. 27 - In Fig. 27-62. a voltmeter of resistance Rv = 300 ...Ch. 27 - Switch S in Fig. 27-63 is closed at time t = 0, to...Ch. 27 - In an RC series circuit, emf = 12.0 V, resistance...Ch. 27 - SSM What multiple of the time constant gives the...Ch. 27 - A capacitor with initial charge q0 is discharge...Ch. 27 - ILW A 15.0 k resistor and a capacitor are...Ch. 27 - Figure 27-64 shows the circuit of a flashing lamp,...Ch. 27 - SSM WWWIn the circuit of Fig. 27-65, = 1.2 kV, C=...Ch. 27 - A capacitor with an initial potential difference...Ch. 27 - GO In Fig. 27-66. R1 = 10.0 k, R2 = 15.0 k, C=...Ch. 27 - Figure 27-67 display two circuits with a charged...Ch. 27 - The potential difference between the plates of a...Ch. 27 - A 1.0 F capacitor with an initial stored energy of...Ch. 27 - GO A 3.00 M resistor and a 1.00 F capacitor are...Ch. 27 - GO Each of the six real batteries in Fig. 27-68...Ch. 27 - In Fig. 27-69, R1 = 20.0 , R2 = 10.0 , and the...Ch. 27 - In Fig.27-70, the ideal battery has emf = 30.0 V,...Ch. 27 - SSM Wires A and B, having equal lengths of 40.0 m...Ch. 27 - What are the a size and b direction up or down of...Ch. 27 - Suppose that, while you are sitting in a chair,...Ch. 27 - GO In Fig. 27-72, the ideal batteries have emfs 1...Ch. 27 - SSM A temperature-stable resistor is made by...Ch. 27 - In Fig. 27-14, assume that = 5.0 V, r = 2.0 , R1...Ch. 27 - SSM An initially uncharged capacitor C is fully...Ch. 27 - In Fig. 27-73, R1 = 5.00 , R2 = 10.0 , R3 = 15.0 ,...Ch. 27 - In Fig. 27-5a, find the potential difference...Ch. 27 - In Fig. 27-8a, calculate the potential difference...Ch. 27 - SSM A controller on an electronic arcade game...Ch. 27 - An automobile gasoline gauge is shown...Ch. 27 - SSM The starting motor of a car is turning too...Ch. 27 - Two resistors R1 and R2 may be connected either in...Ch. 27 - The circuit of Fig. 27-25 shows a capacitor, two...Ch. 27 - In Fig. 27-41, R1 = 10.0 , R2 = 20.0 , and the...Ch. 27 - In Fig. 27-76, R= 10 . what is the equivalent...Ch. 27 - a In Fig. 27-4a, show that the rate at which...Ch. 27 - In Fig. 27-77, the ideal batteries have emfs 1 =...Ch. 27 - Figure 27-28 shows a portion of a circuit through...Ch. 27 - Thermal energy is to be generated in a 0.10 ...Ch. 27 - Figure 27-29 shows three 20.0 resistors. Find the...Ch. 27 - A 120 V power line is protected by a 15 A fuse....Ch. 27 - Figure 27-63 shows an ideal battery of emf = 12...Ch. 27 - SSM A group of N identical batteries of emf and...Ch. 27 - SSM In Fig. 27-48, R1 = R2 = 10.0 , and the ideal...Ch. 27 - SSM In Fig. 27-66, the ideal battery has emf = 30...Ch. 27 - In Fig. 27-81, the ideal batteries have emfs 1 =...Ch. 27 - In Fig. 27-82, an ideal battery of emf = 12.0 V...Ch. 27 - The following table gives the electric potential...Ch. 27 - In Fig. 27-83, 1 = 6.00 V, 2 = 12.0 V, R1= 200 ...Ch. 27 - A three-way 120 V lamp bulb that contains two...Ch. 27 - In Fig. 27-84, R1 = R2 = 2.0 , R3 = 4.0 , R4 = 3.0...
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- In the figure R₁-2150, R₂-7.570, and the ideal battery has emf t-120 V. What is the current at point a if we close (a) only switch S₁. (b) only switches S₁ and S₂, and (c) all three switches? 18R₁R₁R₁ ܢܚܢܚܢܚܐ R₁ R₂ (a) Number (b) Number (c) Number R₂ Units Units Unitsarrow_forward103 In Fig. 27-83, E, = 6.00 V, E, = 12.0 V, R, = 200 N, and R, = 100 N. %3! %3D R. What are the (a) size and (b) direction (up or down) of the current through resistance 1, the (c) size and (d) direc- tion of the current through resistance 2, and the (e) size and (f) direction of the current through battery 2? Figure 27-83 Problem 103.arrow_forward6 Res-monster maze. In Fig. 27-21, all the resistors have a resis- tance of 4.0 0 and all the (ideal) batteries have an emf of 4.0 V. What is the current through resistor R? (If you can find the proper loop through this maze, you can answer the question with a few seconds of mental calculation.) ww ww w- wwarrow_forward
- ww In the circuit shown in the figure, the S switch is closed at t = 0 and the capacitors, which are completely empty, begin to fill. Here & = 15 V, C = 9 uF and R 65 0. A) What is the time constant of the circuit, T, in units of microseconds? Answer: B) When t = T, what is the total charge, in units of microcoulomb, accumulated in the capacitors? Answer:arrow_forwardWhile the switch is open, denote the energy stored in capacitor C1 with U0. After the switch has been closed for a long time, denote the energy stored in C1 with U1. Find the ratio U0/U1. Assume R1=1.87 ohm.arrow_forward(A) The switch S, is closed for a long time in the circuit shown. Then, S, is opened and Sz is closed simultaneously. What is the maximum charge that can be stored in E the capacitor? E = 30 V, L = 4 mH, R = 5 Q, C = 6 µF L R 0.93 mc 0.65 C 0.65 mc 0.93 C 0.35 C 0.35 mc O None of themarrow_forward
- In the figure, E, 12V, E₂ = 6.0V, R, 101, R₂ = 200. R, 30 n. One point of the circuit is grounded (V 0). (a) What are the sizes and directions (up, down, left, right) of the currents through the three resistances? (60) (b) What is the electric potential at point A? (4p) 200 N₂ 12=16, ₁ 201arrow_forward80 In Fig. 27-73, R1 = 5.00 0, R2 = 10.0 0, R3= 15.0 n, C= 5.00 µF, |C = 10.0 µF, and the ideal battery R. %3D has emf & = 20.0 V.Assuming that the circuit is in the steady state, what is the total energy stored in the two R1 C2 capacitors?arrow_forward97 SSM A group of N identical batteries of emf E and internal re- sistance r may be connected all in series (Fig. 27-80a) or all in par- allel (Fig. 27-806) and then across a resistor R. Show that both arrangements give the same current in Rif R = r. N batteries in series ..... (a) N batteries in parallel 3- (6)arrow_forward
- 1) An initially uncharged capacitor C is in a single loop with an ideal battery E and a resistor R. The switch is closed and current versus time data is collected using Logger Pro. A 3.5 3 E- 2.5 2 1.5 0.5 Time (ms) 20 40 60 80 100 120 140 160 180 200 220 240 (a) State the quantity represented by the "area under the curve" (integral) of the current vs. time graph. (b) Describe why the current decreases over time, and eventually 0 current travels through the circuit. Current (mA) 1,arrow_forwardProblem 4, 1.10 Further Application Application of Kirchoffs law for the following mesh find curent I, L.I, I, using Ohm's Law Voltage (current) resistance with the conventionthat a curent loop away from + back %3D to as in mesh1 is consideredpositive voltage negative voltage as in mesh 2 as it loops from backto + 19 V 12 I 3Ω 32 291 20 I, 2. 14 V 10 40 -10 ww wwarrow_forwardAt =0 the switch S is closed with the capacitor unchurged. If C- 40 uF, e- 50 V, and R=5.0 k2, how much energy is stored by the capacitor whenI = 2.0 mA?arrow_forward
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