Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
thumb_up100%
Chapter 28, Problem 28.14P
(a) When the switch S in the circuit of Figure P28.14 is closed, will the equivalent resistance between points a and b increase or decrease? State your reasoning. (b) Assume the equivalent resistance drops by 50.0% when the switch is closed. Determine the value of R.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
In the circuit shown in figure 1, epsilon is equal to 41.0 V, R1= 4 ohms, R2= 6 ohms, and R3= 3 ohms. (D) for the 3 ohm resistor calculate the current through the resistor with S open. (E) what is the potential difference Vabbetween points a and b when the switch S is closed? (F) for the 4 ohm resistor calculate the current through the resistor with S closed. (G) for the 6 ohm resistor calculate the current through the resistor with S closed (H) for the 3 ohm resistor calculate the current through the resistor with S closed. (I) for each resistor, does the current increase or decrease when S is closed?
In the circuit shown in (Figure 1) all meters are idealized and the batteries
have no appreciable internal resistance.
For related problemsolving tips and strategies, you may want to view a
Video Tutor Solution of A complex network.
Figure
25.0+
V
100.0 Ω
a
115.0
S
V
36
V
75.0
A
Ω
b
1 of 1
impi pitivas par
Part C
With the switch closed, find the reading of the voltmeter.
Express your answer in volts.
V =
Submit
Part D
I =
ΑΣΦ
With the switch closed, find the reading of the ammeter.
Express your answer in amperes.
V7 ΑΣΦ
Submit
Request Answer
Request Answer
?
V
A
Consider the circuit below. The battery has an open-circuit voltage of ɛ = 30 V and an internal
resistance ofr = 1N.
R2
= 18.00 N
E = 30.00 V
R1
9.00 N
%3D
ir = 1.00 N
R3
10.00 N
R5
8.00 N
R4 = 10.00 N
Hint
a. Find the equivalent resistance of the circuit (not including the internal resistance).
Reg
b. Find the current out of the battery (do not ignore the internal resistance).
Ibat
A
c. Find the potential drop across each resistor.
o Across Rj and R2: AV =
V.
Across R3 and R4: AV =
V.
Across Rs: Д V —
V.
Across r: AV =
V.
(These drops should add up to the value of ɛ.)
d. Find the currents through Rị and R2:
IRI
A
IR2
A
e. Find the currents through R3 and R4:
IR3
А
IRA
A
f. What is the percentage of the total power supplied by the battery that is dissipated in the internal
resistance of the battery?
A total of
% of the total power supplied by the battery is dissipated in the
internal resistance r.
十
Chapter 28 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 28 - To maximize the percentage of the power from the...Ch. 28 - With the switch in the circuit of Figure 27.4a...Ch. 28 - With the switch in the circuit of Figure 27.6a...Ch. 28 - Prob. 28.4QQCh. 28 - Consider the circuit in Figure 27.17 and assume...Ch. 28 - Is a circuit breaker wired (a) in series with the...Ch. 28 - A battery has some internal resistance. (i) Clan...Ch. 28 - The terminals of a battery are connected across...Ch. 28 - When operating on a 120-V circuit, an electric...Ch. 28 - If the terminals of a battery with zero internal...
Ch. 28 - Prob. 28.6OQCh. 28 - What is the time constant of the circuit shown in...Ch. 28 - When resistors with different resistances are...Ch. 28 - When resistors with different resistances are...Ch. 28 - The terminals of a battery are connected across...Ch. 28 - Are the two headlights of a car wired (a) in...Ch. 28 - In the circuit shown in Figure OQ28.12, each...Ch. 28 - Prob. 28.13OQCh. 28 - A circuit consists of three identical lamps...Ch. 28 - A series circuit consists of three identical lamps...Ch. 28 - Suppose a parachutist lands on a high-voltage wire...Ch. 28 - A student claims that the second of two lightbulbs...Ch. 28 - Why is ii possible for a bird to sit on a...Ch. 28 - Given three lightbulbs and a battery, sketch as...Ch. 28 - Prob. 28.5CQCh. 28 - Referring to Figure CQ28.6, describe what happens...Ch. 28 - Prob. 28.7CQCh. 28 - (a) What advantage does 120-V operation offer over...Ch. 28 - Prob. 28.9CQCh. 28 - Prob. 28.10CQCh. 28 - A battery has an emf of 15.0 V. The terminal...Ch. 28 - Two 1.50-V batterieswith their positive terminals...Ch. 28 - An automobile battery has an emf of 12.6 V and 171...Ch. 28 - As in Example 27.2, consider a power supply with...Ch. 28 - Three 100- resistors are connected as shown in...Ch. 28 - Prob. 28.6PCh. 28 - What is the equivalent resistance of the...Ch. 28 - Consider the two circuits shown in Figure P27.5 in...Ch. 28 - Consider the circuit shown in Figure P28.9. Find...Ch. 28 - (a) You need a 45- resistor, but the stockroom has...Ch. 28 - A battery with = 6.00 V and no internal...Ch. 28 - A battery with emf and no internal resistance...Ch. 28 - (a) Kind the equivalent resistance between points...Ch. 28 - (a) When the switch S in the circuit of Figure...Ch. 28 - Prob. 28.15PCh. 28 - Four resistors are connected to a battery as shown...Ch. 28 - Consider die combination of resistors shown in...Ch. 28 - For the purpose of measuring the electric...Ch. 28 - Calculate the power delivered to each resistor in...Ch. 28 - Why is the following situation impossible? A...Ch. 28 - Consider the circuit shown in Figure P28.21 on...Ch. 28 - In Figure P28.22, show how to add just enough...Ch. 28 - The circuit shown in Figure P27.17 is connected...Ch. 28 - For the circuit shown in Figure P28.24, calculate...Ch. 28 - What are the expected readings of (a) the ideal...Ch. 28 - The following equations describe an electric...Ch. 28 - Taking R = 1.00 k and = 250 V in Figure P27.19,...Ch. 28 - You have a faculty position at a community college...Ch. 28 - The ammeter shown in Figure P28.29 reads 2.00 A....Ch. 28 - In the circuit of Figure P28.30, determine (a) the...Ch. 28 - Using Kirchhoffs rules, (a) find (he current in...Ch. 28 - In the circuit of Figure P27.20, the current I1 =...Ch. 28 - In Figure P28.33, find (a) the current in each...Ch. 28 - For the circuit shown in Figure P27.22, we wish to...Ch. 28 - Find the potential difference across each resistor...Ch. 28 - (a) Can the circuit shown in Figure P27.21 be...Ch. 28 - An uncharged capacitor and a resistor are...Ch. 28 - Consider a series RC circuit as in Figure P28.38...Ch. 28 - A 2.00-nF capacitor with an initial charge of 5.10...Ch. 28 - A 10.0-F capacitor is charged by a 10.0-V battery...Ch. 28 - In the circuit of Figure P27.25, the switch S has...Ch. 28 - In the circuit of Figure P27.25, the switch S has...Ch. 28 - The circuit in Figure P28.43 has been connected...Ch. 28 - Show that the integral 0e2t/RCdtin Example 27.11...Ch. 28 - A charged capacitor is connected to a resistor and...Ch. 28 - Prob. 28.46PCh. 28 - Prob. 28.47PCh. 28 - Turn on your desk lamp. Pick up the cord, with...Ch. 28 - Assume you have a battery of emf and three...Ch. 28 - Find the equivalent resistance between points a...Ch. 28 - Four 1.50-V AA batteries in series are used to...Ch. 28 - Four resistors are connected in parallel across a...Ch. 28 - The circuit in Figure P27.35 has been connected...Ch. 28 - The circuit in Figure P27.34a consists of three...Ch. 28 - For the circuit shown in Figure P28.55. the ideal...Ch. 28 - The resistance between terminals a and b in Figure...Ch. 28 - (a) Calculate the potential difference between...Ch. 28 - Why is the following situation impossible? A...Ch. 28 - A rechargeable battery has an emf of 13.2 V and an...Ch. 28 - Find (a) the equivalent resistance of the circuit...Ch. 28 - When two unknown resistors are connected in series...Ch. 28 - When two unknown resistors are connected in series...Ch. 28 - The- pair of capacitors in Figure P28.63 are fully...Ch. 28 - A power supply has an open-circuit voltage of 40.0...Ch. 28 - The circuit in Figure P27.41 contains two...Ch. 28 - Two resistors R1 and R2 are in parallel with each...Ch. 28 - Prob. 28.67APCh. 28 - A battery is used to charge a capacitor through a...Ch. 28 - A young man owns a canister vacuum cleaner marked...Ch. 28 - (a) Determine the equilibrium charge on the...Ch. 28 - Switch S shown in Figure P28.71 has been closed...Ch. 28 - Three identical 60.0-W, 120-V lightbulbs are...Ch. 28 - A regular tetrahedron is a pyramid with a...Ch. 28 - An ideal voltmeter connected across a certain...Ch. 28 - In Figure P27.47, suppose the switch has been...Ch. 28 - Figure P27.48 shows a circuit model for the...Ch. 28 - The student engineer of a campus radio station...Ch. 28 - The circuit shown in Figure P28.78 is set up in...Ch. 28 - An electric teakettle has a multiposition switch...Ch. 28 - A voltage V is applied to a series configuration...Ch. 28 - In places such as hospital operating rooms or...Ch. 28 - The switch in Figure P27.51a closes when Vc23Vand...Ch. 28 - The resistor R in Figure P28.83 receives 20.0 W of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forwardFor the circuit shown in Figure P28.55. the ideal voltmeter reads 6.00 V and the ideal ammeter reads 3.00-k. Find (a) the value of K, (b) the emf of the battery, and (c) the voltage across the 3.00-kft resistor.arrow_forwardYour lab partner builds a circuit consisting of a power supply, voltage probe, current probe, and two resistors in an unknown configuration. By measuring the voltage and current, you can create a plot of I vs. V. By linearly fitting your plot you get the following fit, Slope: m = 0.0027 Om = 0.0003 %3D Intercept: 6 = 0.002 A Ob = 0.003 A From your fit, what is the equivalent resistance and uncertainty of the resistor a) configuration? b). If your Lab partner calculates the theoretical value for the resistor in series as Reg = (360 ± 15) N, can you conclude your resistor configuration in part a is in series? Explain. c) If the resistors used in the experimental setup had the values R1 = (390 ± 20%) N and R2 = (150 ± 20%) N, what is the %3D theoretical value for the resistors in series?arrow_forward
- The capacitor in the circuit shown below is initially uncharged. The switch is closed at t = 0 s. AVbattery = 24 V, C = 3.0 μF, and R = 2.0 Q. At sometime after the switch is closed, the voltage across the resistor is measured to be 16 V. What is the charge on the capacitor at this time, in µC? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardWhen switch S in (Figure 1) is open, the voltmeter V of the battery reads 3.13 V. When the switch is closed, the voltmeter reading drops to 2.93 V, and the ammeter A reads 1.69 A. Assume that the two meters are ideal, so they don't affect the circuit. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A source with a short circuit. Figure S V r E -ww+ R A 1 of 1 Find the emf. Express your answer in volts. E = Submit Part B r = Find the internal resistance r of the battery. Express your answer in ohms. Submit Part C Π| ΑΣΦ Request Answer R= | ΑΣΦ Request Answer Find the resis ance R. Express your answer in ohms. IVE| ΑΣΦ ? ? ? V Ω Ωarrow_forwardWhat is the voltage between points a andb (AVab = Vb-Va) if R1 = 4.00 Q, R2 and R3 are unknown, R4=8.00 Q and R5=D4.00 Q, the equivalent resistance of the circuit is 7.34 2, and ɛ = 7.00 V. Pay %3D attention to the sign!arrow_forward
- In the circuit shown below, Vs = 60 V, R1 = 7 Q, R2 =10 V, R3 = 6 Q and R4 = 6 Q. The Thevenin equivalent of this circuit consists of a voltage source Vth and series resistance RTh. FInd Vth and Rth and hence determine the current that will flow through a 50 Q resistor connected between points A and B. Give your answer in Amps to three decimal places. RTh I R3 R2 TA Vs VTh B Next > < Previous R4 R1 That -A Barrow_forwardConsider the circuit shown in the figure below, where R, = 8.00 0, R, = 9.00 0, and E = 11.0 V. 10.0 N R2 5.00 N 2.00 N R1 (a) Find the voltage (in V) across R,. (b) Find the current (in A) in R,. Aarrow_forwardThe four resistances are R1 = 1 ?, R2 = 2 ?, R3 = 4 ?, and R4 = 12?. The power source has a potential difference V = 12 V. (a) Find the equivalent resistance of the circuit. (b) What is the value of the current I in the circuit? (c) Find the currents in R3 and R4.arrow_forward
- What are the expected readings of the following in the figure below? (R = 7.10 Q, AV = 6.70 V) R Δν 10.0 N V 5.00 N R 4.50 V (a) ideal ammeter (Give your answer in mA.) 246 Apply Kirchhoff's rules to generate a system of equations for the currents in the various branches of the circuit. mA (b) ideal voltmeter (Give your answer in volts.) 2.2 V (c) What If? How would the readings in the ammeter (in mA) and voltmeter (in volts) change if the 4.50 V battery was flipped so that its positive terminal was to the right? ideal ammeter 247 X mA ideal voltmeter 11.2 V Need Help? Read It Master Itarrow_forwardConsider the direct current circuit shown in the figure. The batteries are 5*1.3 V and the resistors are 5Ω. Find the potential difference VAB, in magnitude, between the top-left vertex and the bottom-right vertex (points A and B).arrow_forwardConsider the circuit shown in the figure below. (Let R1 = 5.00 Ω, R2 = 7.00 Ω, and E = 10.0 V.). . (a) Find the voltage (in V) across R1.. . . . . (b) Find the current (in A) in R1.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY