Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 32.2, Problem 32.1QQ
Consider the voltage phasor in Figure 32.4, shown at three instants of time. (i) Choose the part of the figure, (a), (b), or (c), that represents the instant of time at which the instantaneous value of the voltage has the largest magnitude. (ii) Choose the part of the figure that represents the instant of time at which the instantaneous value of the voltage has the smallest magnitude.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In the figure, suppose the switch has been closed for a length of time sufficiently long for the capacitor to become fully charged. For this circuit, R1 = 12.0 kΩ, R2 = 15.0 kΩ, R3 = 3.000 kΩ, C = 10.0 μF , and emf = 9.00 V. Find (d) the potential differance across R2. (e) the charge on the capacitor.
Help. You decide to use a toaster to toast a slice of bread using the wall outlet of your home. Knowing that the voltage supply of your home is alternating given by the function V = 120 sin (2 πft), where f = 120 Hz and t is time in seconds:
1. If the toaster oven uses nichrome wire that measures a total length of 0. 25 m with a thickness of 0.5 mm (diameter of wire), what is the resistance of the wire when heats up to 100.0 C from room temperature of 20. 0 °C?
2. Knowing the resistance value of the wire from part a) and using Ohms Law, write the alternating current equation.
3. What is the rms value for current and voltage for our toaster oven circuit?
4. How much average electrical energy J does the toaster oven use if you toast your bread for 1 minute?
A parallel-plate capacitor with plate separation d is connected to a source of emf that places a time-dependent voltage V(t) across its circular plates of radius r0 and area A = πr0 2 (see below).
(a) Write an expression for the time rate of change ofenergy inside the capacitor in terms of V(t) and dV(t)/dt.(b) Assuming that V(t) is increasing with time, identify thedirections of the electric field lines inside the capacitor andof the magnetic field lines at the edge of the region betweenthe plates, and then the direction of the Poynting vectorS →at this location.(c) Obtain expressions for the time dependence of E(t), forB(t) from the displacement current, and for the magnitudeof the Poynting vector at the edge of the region between theplates.(d) From S → , obtain an expression in terms of V(t) anddV(t)/dt for the rate at which electromagnetic field energyenters the region between the plates.(e) Compare the results of parts (a) and (d) and explain therelationship between them.
Chapter 32 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 32.2 - Consider the voltage phasor in Figure 32.4, shown...Ch. 32.3 - Consider the AC circuit in Figure 32.8. The...Ch. 32.4 - Consider the AC circuit in Figure 32.11. The...Ch. 32.4 - Consider the AC circuit in Figure 32.12. The...Ch. 32.5 - Label each part of Figure 32.16, (a), (b), and...Ch. 32.6 - Prob. 32.6QQCh. 32.7 - Prob. 32.7QQCh. 32 - (a) What is the resistance of a lightbulb that...Ch. 32 - A certain lightbulb is rated at 60.0 W when...Ch. 32 - The current in the circuit shown in Figure P32.3...
Ch. 32 - Figure P32.4 shows three lightbulbs connected to a...Ch. 32 - Prob. 5PCh. 32 - Prob. 6PCh. 32 - Prob. 7PCh. 32 - Prob. 8PCh. 32 - An AC source has an output rms voltage of 78.0 V...Ch. 32 - Prob. 10PCh. 32 - Prob. 11PCh. 32 - An AC source with an output rms voltage of 86.0 V...Ch. 32 - What is the maximum current in a 2.20-F capacitor...Ch. 32 - Prob. 14PCh. 32 - In addition to phasor diagrams showing voltages...Ch. 32 - An AC source with Vmax = 150 V and f = 50.0 Hz is...Ch. 32 - You are working in a factory and have been tasked...Ch. 32 - Prob. 18PCh. 32 - Prob. 19PCh. 32 - A 60.0-ft resistor is connected in series with a...Ch. 32 - A series RLC circuit has a resistance of 45.0 and...Ch. 32 - Prob. 22PCh. 32 - Prob. 23PCh. 32 - An AC voltage of the form v = 90.0 sin 350t, where...Ch. 32 - Prob. 25PCh. 32 - A series RLC circuit has components with the...Ch. 32 - You wish to build a series RLC circuit for a...Ch. 32 - A 10.0- resistor, 10.0-mH inductor, and 100-F...Ch. 32 - Prob. 29PCh. 32 - The primary coil of a transformer has N1 = 350...Ch. 32 - Prob. 31PCh. 32 - A transmission line that has a resistance per unit...Ch. 32 - Prob. 33APCh. 32 - Prob. 34APCh. 32 - Prob. 35APCh. 32 - Prob. 36APCh. 32 - Prob. 37APCh. 32 - Prob. 38APCh. 32 - Prob. 39APCh. 32 - Prob. 40APCh. 32 - Prob. 41APCh. 32 - (a) Sketch a graph of the phase angle for an RLC...Ch. 32 - A series RLC circuit contains the following...Ch. 32 - Review. In the circuit shown in Figure P32.44,...Ch. 32 - You have decided to build your own speaker system...Ch. 32 - Prob. 46APCh. 32 - Prob. 47APCh. 32 - A series RLC circuit in which R = l.00 , L = 1.00...Ch. 32 - The resistor in Figure P32.49 represents the...Ch. 32 - Prob. 50CPCh. 32 - Prob. 51CP
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
- QI. A capacitor consists of two circular plates of radius a separated by a distance d (assume d a. (A) Use Gauss' Law to find the electric field between the plates as a function of time t, in terms of q(1), a, ɛ, and z. The vertical direction is the k direction. (B)Now take an imaginary flat disc of radius rarrow_forward. Calculate current across the capacitor shown in Fig. P8.6 if the voltage input is v1(t)=30 cos (320t-50°) V . v(t) i(t) Figure P8.6 For a current i(t) = C cos(wt+P), enter the value of the phase angle (P). (be sure that your answer is between -180deg to 180deg.) Notes on entering solution: • Enter your solution in degrees Have your current in cosine format . Do not include units in your answer ex. 5° is entered as 5 C = 1 µFarrow_forwardA rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 40.0 g and electrical resistance 0.300 Ω rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance L = 9.00 cm apart. (Figure 1)The rails are also connected to a voltage source providing a voltage of V = 5.00 V .The rod is placed in a vertical magnetic field. The rod begins to slide when the field reaches the value B = 0.131 T . Assume that the rod has a slightly flattened bottom so that it slides instead of rolling. Use 9.80 m/s^2 for the magnitude of the acceleration due to gravity. A) Find μ_s, the coefficient of static friction between the rod and the rails. Give the answer numericallyarrow_forwardQ (t) = 3e-0.7t sin() + 0.01 sin(4t) - 0.02 cos(4t) The function Q defined above models the electric charge, measured in coulombs, inside a lightbulb t seconds after it is turned on. Which of the following presents the method for finding the instantaneous rate of change of the lightbulb's electric charge, in coulombs per second, at time t = 4? Q" (4) = -0.213 A B C D Q'(4) = -0.171 Q(4) Q (0) 4-0 = 0.053 Q (4) = 0.194arrow_forwardAt position x=0 the voltage is 100V. At x=0.5m the voltage is 0V. What is the direction and strength of the average x-component of the electric field in that region?arrow_forwardThe capacitor in the circuit shown below is initially uncharged. The switch is closed at t = 0 s. AV battery = 30 V, C = 3.0 F, and R = 2.0 2. At sometime after the switch is closed, the current in the circuit is measured to be 9.3 A. What is the charge on the capacitor at this time, in Coulomb? 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_forward#1. The capacitor in the figure is initially uncharged and the switch is at position c and not connected to either side of the circuit. At t = 0, the switch is flipped to position a for 20 ms,thenflipped back to position c for 10 ms, then flipped to position b for 20 ms, and finally flipped toposition c again. a) Using the Kirchhoff Voltage Law, write the differential equationsthat describethe circuit between t = 0 –20 ms andt = 30 –50 ms. b) Solve two differential equations you find ina) with appropriate initial condition to find the current through and the voltage across the capacitor as functions of time. c) Sketch the graphs of the current and voltage you find in b) from t = 0 to 60 ms. #2. Now the 40 uF capacitor in the circuit in #1 is replaced with a 0.4 H inductor. The inductor in this circuit is initially uncharged and the switch is at position c and not connected to either side of the circuit. At t = 0, the switch is flipped to position a for 20 ms, then flipped back to…arrow_forwardA series electric circuit contains a resistor R, a capacitor C and a battery supplying a time-varyingelectromotive force V(t). The charge q on the capacitor therefore obeys the equation R(dq/dt) + (q/C) = V(t) Assuming that initially there is no charge on the capacitor, and given that = sinωt V(t) V0 , findthe charge on the capacitor as a function of time. [Hint: First, find an appropriate integrating factor.]arrow_forwardA 15000-ohm resistor and a 6-milliHenry inductor are connected in parallel. At = 0, this parallel combination is connected across a 2mA current source. Find the current flowing through the resistor at t = 1 microsecond after connecting the current source. Note: The shortcut formula we are using is for the current flowing through the inductor, not through the resistor. 1.836 milliAmpere 2 milliAmpere 0.164 milliAmpere O Amperearrow_forwardAssume a capacitor, C = A μF, summarize the concept of capacitor charging through graphical representation of capacitor voltages and capacitor current separately. Also derives the expression for v(t) and i(t). A=0.22 C=11arrow_forwardSome surgery is performed with high-voltage electricity passing from a metal scalpel through the tissue being cut. Considering the nature of electric fields at the surface of conductors, why would you expect most of the current to flow from the sharp edge of the scalpel? Do you think high- or low-frequency AC is used?arrow_forwardChapter 31, Problem 017 GO In the figure, R = 14.0 2, C = 6.87 uf, and L - 51.0 mH, and the ideal battery has emf = 31.0 V. The switch is kept in position a for a long time and then thrown to position b. What are the (a) frequency and (b) current amplitude of the resulting oscillations? (a) Number Units (b) Number Unitsarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY