Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 20.2, Problem 3cTH
Consider the following discussion between two students regarding the change in the circuit when the wire in the circuit is cut (part b):
| Student 1: | “I think that bulb B will get brighter. Bulb B used to share the current with bulb C, but now it gets all the current. So bulb B will get brighter.” |
| Student 2: | “I don’t think so. Now there aren’t as many paths for the current, so the resistance in the circuit has increased. Since the resistance in the circuit has gone up, the current in the circuit decreases. Bulb B will get dimmer.” |
i. Is Student 1 correct? Why or why not?
ii. Is Student 2 correct? Why or why not?
iii. Use what you have learned about voltage to determine whether bulb B will become brighter, become dimmer, or stay the same brightness when the wire is cut. Explain how you determined your answer.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Consider the circuit below which shows three 1k2 resistors connected in parallel to a
DC emf. The dotted lines at the extreme right of the picture are intended to indicate
that the circuit can be extended by adding an arbitrary number N of additional 1k2
resistors in parallel so that the total number of resistors in the circuit equals 3 + N.
1k
1k
1k
If we take the limit as N →0 what happens to the total current through the circuit,
and what happens to the total electrical power delivered by the emf?
O both the current and the power approach 0
the current approaches
o and the power approaches 0
both the current and the power approach ∞
the current approaches 0 and the power approaches o
1. In Module 4, we learned the concept of electric current and resistance. Most circuits have
more than one resistor, often connected in series, parallel, or combination of series and
parallel.
(a) Imagine a circuit with two identical bulbs connected one after the other (in series) as
shown. Discuss how the brightness of the two bulbs will compare to the brightness of
an identical bulh in a single-bulb circuit. Explain your
reasoning.
(b) Now consider the circuit pictured to the right with the circuit branching to two bulbs
and back again. (Two bulbs connected in this way are said to be in parallel.) Discuss
how the brightness of the two bulbs will compare to the brightness of an identical
bulb in a single-bulb circuit. Explain your reasoning.
Both circuits have a 12V battery and three 3-ohm resistors, but they are connected very differently. The series circuit on the left shows the three resistors in series. The parallel circuit on the right shows the three resistors in parallel. Select all the statements below that are true. Select 3:
27.3 new circuit.JPG
Group of answer choices
In the left series circuit, the equivalent resistance is 1 ohm.
In the right parallel circuit, voltage across each resistor is the same.
Both circuits dissipate the same amount of power.
In the right parallel circuit, the equivalent resistance is 9 ohm.
In the left series circuit, current is the same through all resistors.
In the right parallel circuit, the equivalent resistance is 1 ohm.
Chapter 20 Solutions
Tutorials in Introductory Physics
Ch. 20.1 - In tutorial, you compared the relative brightness...Ch. 20.1 - Use the model for electric current to rank the...Ch. 20.1 - Rang the brightness of the bulbs. Explain your...Ch. 20.1 - A wire is now added to the circuit as shown. i....Ch. 20.1 - Rank the networks according to their equivalent...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - The network AE above are connected, in turn, to...Ch. 20.1 - Rank the bulbs in order from brightest to dimmest....Ch. 20.1 - Suppose that a switch has been added to the...
Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - In the circuit at right, the voltage across bulb 1...Ch. 20.2 - Prob. 2bTHCh. 20.2 - Box A and box B are now interchanged. It is...Ch. 20.2 - Consider the circuit as shown. i. Rank bulbs A, B,...Ch. 20.2 - b. A student cuts the write between bulbs A and C...Ch. 20.2 - Consider the following discussion between two...Ch. 20.2 - Rank bulbs 16 in order or brightness. Explain your...Ch. 20.2 - Rank the voltages across the bulbs. Explain your...Ch. 20.2 - Write an equation that relates the voltage across...Ch. 20.2 - Bulb 1 is removed from its socket. i. Does the...Ch. 20.3 - Describe the behavior of the bulb in the two...Ch. 20.3 - A second identical bulb is flow added to the...Ch. 20.3 - Just after the switch is closed: • what is the...Ch. 20.3 - A long time after the switch is closed: • rank the...Ch. 20.3 - Summarize your results by describing the behavior...
Additional Science Textbook Solutions
Find more solutions based on key concepts
27. A 4000 kg truck is parked on a 7.0° slope. How big is the friction force on the truck?
College Physics: A Strategic Approach (4th Edition)
Choose the best answer to each of the following. Explain your reasoning. What makes astronomers think that Cygn...
Cosmic Perspective Fundamentals
40. In descending order, rank the rocks in terms of their susceptibility to chemical erosion:
marble,
limestone...
Conceptual Physical Science (6th Edition)
66. It’s possible for a determined group of people to pull an aircraft. Drag is negligible at low speeds, and t...
College Physics: A Strategic Approach (3rd Edition)
The force, when you push against a wall with your fingers, they bend.
Conceptual Physics (12th Edition)
12. A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a ...
College Physics (10th Edition)
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
- Consider the circuit shown in the following figure (Figure 1) , but with the bar moving to the right with speed vv. The bar has length 0.373 m , R = 49.1 Ω , and B = 0.683 T Part B At an instant when the resistor is dissipating electrical energy at a rate of 0.883 J/s, what is the speed of the bar?arrow_forwardOn the basis of your second set of data, are there any patterns to the way that currents behave in a parallel circuit? At this time you should be able to write the general characteristics of currents, voltages and resistances in parallel circuits.arrow_forwardA circuit is constructed as shown in the diagram to the right. R1 = 22 Ω, R2 = 54 Ω, R3 = 83 Ω, and R4 = 64 Ω. Write an equation for the equivalent resistance of the circuit in terms of the individual resistances. Calculate for the equivalent resistance of the circuit in ohms.arrow_forward
- Solve the following problems. Show and COMPLETE solutions. Draw the CIRCUIT DIAGRAM or the equivalent circuit. 1. Three lamps of resistances 5 Ω, 10 Ω and 15 Ω are connected in series. The combination is then connected to a 120-V battery. Find the equivalent resistance of the circuit, the total current in the circuit, the voltage across each lamp, the total power supplied by the battery to the circuit and the power dissipated by each lamp.arrow_forwardIn figure 1, suppose that ε = 69.0 V, R = 250.0 ohms, and L = 0.170 H. Which switch S2 open, switch S1 is left closed until a constant current is established. Then S2 is closed and S1 is opened, taking the battery out of the circuit. Part A: What is the initial current, just after S2 is closed and S1 is opened, then determine the current in the resistor at t = 4.50x 10^-4 s. Part B: What is the potential difference between points b and c at t = 4.5 x 10^-4 s, then determine which point is at a higher potential (b or c)? Part C: How long does it take the current to decrease to half its initial value? Answer in seconds. Thank You for the help in advance!arrow_forwardThe switch in the figure below is connected to position a for a long time interval. At t = 0, the switch is thrown to position b. After this time, what are the following? (Let C = 1.40 µF.) The circuit is a rectangular loop with a vertical wire in the middle that extends from the bottom side of the loop to almost reach the top side, ending at one side of a switch. This vertical wire contains a capacitor of capacitance C. The left side contains a battery of potential difference 12.0 V, with the positive terminal above the negative terminal. The top side contains, from left to right, a resistor of resistance 10.0 Ω, point a, point b, and an inductor of inductance 0.100 H. A gap separates points a and b. In the figure, the switch is in contact with point a. (a) the frequency of oscillation of the LC circuit Hz(b) the maximum charge that appears on the capacitor µC(c) the maximum current in the inductor mA(d) the total energy the circuit possesses at t = 3.00 sarrow_forward
- The oscillating current in an electrical circuit is as follows, where I is measured in amperes and t is measured in seconds. I = 8 sin(60πt) + cos(120πt) Find the average current for each time interval. (Round your answers to three decimal places.) A.) 0 ≤ t ≤ 1/60 B.) 0 ≤ t ≤ 1/240 C.) 0 ≤ t ≤ 1/30arrow_forwardThe switch in the figure below is connected to position a for a long time interval. At t = 0, the switch is thrown to position b. After this time, what are the following? (Let C = 1.50 µF.) The circuit is a rectangular loop with a vertical wire in the middle that extends from the bottom side of the loop to almost reach the top side, ending at one side of a switch. This vertical wire contains a capacitor of capacitance C. The left side contains a battery of potential difference 12.0 V, with the positive terminal above the negative terminal. The top side contains, from left to right, a resistor of resistance 10.0 Ω, point a, point b, and an inductor of inductance 0.100 H. A gap separates points a and b. In the figure, the switch is in contact with point a. (a) the frequency of oscillation of the LC circuit Hz(b) the maximum charge that appears on the capacitor µC(c) the maximum current in the inductor mA(d) the total energy the circuit possesses at t = 3.00 s µJarrow_forwardConsider the following electrical circuit ... R1 R3 R2 The current through the circuit (in amps) is determined by the voltage through the circuit (in volts) divided by the resistance (in ohms) through the circuit. Complete the script to calculate the total current through the circuit This is the script for calculating the total current of the circuit R1 = 5; R2 = 10; R3 = 2; V = 6; RI = 1/( (1/Blank 1)+(1/Blank 2)) +Blank 3 I = Blank 4/Blank 5 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer Blank 5 Add your answerarrow_forward
- Can you tell me if you agree with the comment and if not and why? Thank you. Objective: In this forum comment about the following case: Your friend says that according to Ohm's law, a high voltage produces a high current. Then he asks you that, then, how is it possible to transmit energy at high voltage and low current in a transmission line? What is your enlightening response. Comment According to Ohm's law, every time the current in a circuit that flows through a resistance, the voltage is lower after it passes through it. This is called the voltage drop and there is a relationship between resistance, current, and voltage drop. (V = I * R). When losing voltage the consequence would be a low current. So how is it possible to transmit energy at high voltage and low current in a transmission line? As electricity is transmitted over long distances there is a loss of energy. The losses are calculated with the formula I ^ 2 * R, so the power losses are quadrupled, so the voltage will…arrow_forwardcwire A wire B d/2 Vacuumarrow_forwardConsider the circuit shown in (Figure 1). Assume E = 12 V. What is the equivalent capacitance? What is the charge on 3.0 μF capacitor? What is the charge on 4.0 μF capacitor? What is the charge on 6.0 μF capacitor?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Series & Parallel - Potential Divider Circuits - GCSE & A-level Physics; Author: Science Shorts;https://www.youtube.com/watch?v=vf8HVTVvsdw;License: Standard YouTube License, CC-BY