EBK PHYSICS
5th Edition
ISBN: 8220103026918
Author: Walker
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 24, Problem 88GP
A Light-Dimmer Circuit The intensity of a lightbulb with a resistance of 120 Ω is controlled by connecting it in series with an inductor whose inductance can be varied from L = 0 to L = Lmax. This “light dimmer” circuit is connected to an ac generator with a frequency of 60 0 Hz and an rms voltage of 110 V. (a) What is the average power dissipated in the lightbulb when L = 0? (b) The inductor is now adjusted so that L = Lmax. In this case, the average power dissipated in the lightbulb is one-fourth the value found in part (a). What is the value of Lmax?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Chapter 24 Solutions
EBK PHYSICS
Ch. 24.1 - A circuit has a sinusoidally varying current whose...Ch. 24.2 - Circuit 1 has a capacitor with a capacitance C and...Ch. 24.3 - The two circuits shown in Figure 24-14 have...Ch. 24.4 - A circuit consists of an ac generator and an...Ch. 24.5 - Prob. 5EYUCh. 24.6 - An RLC circuit has a resonance frequency of 60 Hz....Ch. 24 - Why is the current in an ac circuit not always in...Ch. 24 - An LC circuit is driven at a frequency higher than...Ch. 24 - An LC circuit is driven at a frequency lower than...Ch. 24 - Prob. 4CQ
Ch. 24 - Prob. 5CQCh. 24 - Two RLC circuits have different values of L and C....Ch. 24 - Can an RLC circuit have the same impedance at two...Ch. 24 - An ac generator produces a peak voltage of 75 V....Ch. 24 - In many European homes the rms voltage available...Ch. 24 - An rms voltage of 120 V produces a maximum current...Ch. 24 - The rms current in an ac circuit with a resistance...Ch. 24 - A 3.33-k resistor is connected to a generator with...Ch. 24 - A 75-watt lightbulb uses an average power of 75 W...Ch. 24 - Inverter Efficiency An array of solar panels...Ch. 24 - Prob. 8PCECh. 24 - The reactance of a capacitor is 65 at a frequency...Ch. 24 - The capacitive reactance of a capacitor at 60 0 Hz...Ch. 24 - A 105-F capacitor is connected to an ac generator...Ch. 24 - The rms voltage across a 0.010-F capacitor is 2.8...Ch. 24 - Predict/Calculate The rms current through a 55.5-F...Ch. 24 - The maximum current in a 22-F capacitor connected...Ch. 24 - PredicCalculate An rms voltage of 20 5 V with a...Ch. 24 - A circuit consists of a 2.00-kHz generator and a...Ch. 24 - A 0.22-F capacitor is connected to an ac generator...Ch. 24 - At what frequency will a generator with an rms...Ch. 24 - PredicCalculate A 22 0-Fcapacitor is connected to...Ch. 24 - Find the impedance of a 60 0-Hz circuit with a...Ch. 24 - An ac generator with a frequency of 125 Hz and an...Ch. 24 - The rms current in an RC circuit is 0.72 A. The...Ch. 24 - When an ac generator with a frequency of 180 Hz...Ch. 24 - A 50 0-Hz generator with an rms voltage of 115 V...Ch. 24 - (a) At what frequency must the circuit in Problem...Ch. 24 - Find the power factor for an RC circuit connected...Ch. 24 - Predict/Calculate (a) Determine the power factor...Ch. 24 - Square-Wave Voltage II The square-wave voltage...Ch. 24 - Prob. 29PCECh. 24 - An inductor has a reactance of 56 5 at 85 0 Hz....Ch. 24 - What is the rms current in a 97 5-mH inductor when...Ch. 24 - What rms voltage is required to produce an rms...Ch. 24 - Loudspeaker Impedance A loudspeakers impedance is...Ch. 24 - Prob. 34PCECh. 24 - A 525- resistor and a 295-mH inductor are...Ch. 24 - The rms current in an RL circuit is 0 26 A when it...Ch. 24 - An ac generator with a frequency of 1 55 kHz and...Ch. 24 - Predict/Calculate An rms voltage of 22 2 V with a...Ch. 24 - A 0.22-H inductor is connected to an ac generator...Ch. 24 - The phase angle in a certain RL circuit is 68 at a...Ch. 24 - (a) Sketch the phasor diagram for an ac circuit...Ch. 24 - A large air conditioner has a resistance of 7 0 ...Ch. 24 - Prob. 43PCECh. 24 - Prob. 44PCECh. 24 - Prob. 45PCECh. 24 - Predict/Explain (a) When the ac generator in...Ch. 24 - Prob. 47PCECh. 24 - Predict/Explain (a) When the ac generator in...Ch. 24 - Find the rms voltage across each element in an RLC...Ch. 24 - What is the impedance of a 1 50-kQ resistor, a...Ch. 24 - Consider the circuit shown in Figure 24-34 The ac...Ch. 24 - What is the phase angle in an RLC circuit with R =...Ch. 24 - An ac voltmeter, which displays the rms voltage...Ch. 24 - Prob. 54PCECh. 24 - (a) Sketch the phasor diagram for an ac circuit...Ch. 24 - A generator connected to an RLC circuit has an rms...Ch. 24 - Prob. 57PCECh. 24 - Predict/Explain In an RLC circuit a second...Ch. 24 - An RLC circuit has a resonance frequency of 1 9...Ch. 24 - The Magnetron A magnetron in a kitchen microwave...Ch. 24 - At resonance, the rms current in an RLC circuit is...Ch. 24 - The resistance in an RLC circuit is doubled (a)...Ch. 24 - Predict/Calculate The capacitive reactance in an...Ch. 24 - Predict/Calculate The capacitive reactance in an...Ch. 24 - A 115- resistor, a 67 6-mH inductor, and a 189-F...Ch. 24 - (a) Find the frequency at which an 18-F capacitor...Ch. 24 - Consider an RLC circuit with R = 105 , L- 518 mH,...Ch. 24 - Predict/Calculate An RLC circuit has a resonance...Ch. 24 - An RLC circuit has a capacitance of 0 29 F. (a)...Ch. 24 - CE BIO Persistence of Vision Although an...Ch. 24 - CE An RLC circuit is driven at its resonance...Ch. 24 - CE Predict/Explain Suppose the circuits shown in...Ch. 24 - Prob. 73GPCh. 24 - Prob. 74GPCh. 24 - A 4 40-F and an 8.80-F capacitor are connected in...Ch. 24 - A 4.40-F and an 8.80-F capacitor are connected in...Ch. 24 - A 12.5-F capacitor and a 47.5-F capacitor are...Ch. 24 - CE A generator drives an RLC circuit with the...Ch. 24 - Trapped on a deserted island, you salvage some...Ch. 24 - Predict/Calculate When a certain resistor is...Ch. 24 - Find the average power consumed by an RC circuit...Ch. 24 - A 1 15-k resistor and a 505-mH inductor are...Ch. 24 - Prob. 83GPCh. 24 - Predict/Calculate Figure 24-39 shows the phasor...Ch. 24 - Prob. 85GPCh. 24 - Predict/Calculate Black-Box Experiment You are...Ch. 24 - An RLC circuit with R = 20.0 , L = 295 mH, and C =...Ch. 24 - A Light-Dimmer Circuit The intensity of a...Ch. 24 - An electric motor with a resistance of 15 arid an...Ch. 24 - Predict/Calculate Tuning a Radio A radio tuning...Ch. 24 - If the maximum voltage in the square wave shown in...Ch. 24 - An ac generator supplies an rms voltage of 5.00 V...Ch. 24 - An RC circuit consists of a resistor R = 32 , a...Ch. 24 - Prob. 94PPCh. 24 - Prob. 95PPCh. 24 - Prob. 96PPCh. 24 - Prob. 97PPCh. 24 - Prob. 98PPCh. 24 - Prob. 99PP
Additional Science Textbook Solutions
Find more solutions based on key concepts
The number of named species is about __________, but the actual number of species on Earth is estimated to be a...
Biology: Life on Earth (11th Edition)
31. Spacecraft have been sent to Mars in recent years. Mars is smaller than Earth and has correspondingly weake...
College Physics: A Strategic Approach (3rd Edition)
In a rapidly changing environment, which bacterial population would likely be more successful: one that has ind...
Campbell Biology (11th Edition)
1.14 Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homo...
Chemistry: The Central Science (14th Edition)
APPLY 1.2 Express the following quantities in scientific notation
using fundamental SI units of mass and lengt...
Chemistry (7th Edition)
18. SCIENTIFIC THINKING By measuring the fossil remains of Homo floresiensis, scientists have estimated its wei...
Campbell Biology: Concepts & Connections (9th 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
- A 20-mH inductor is connected across an AC source with a variable frequency and a constant-voltage amplitude of 9.0 V. (a) Determine the reactance of the circuit and the maximum current through the inductor when the frequency Is set at 20 kHz. (b) Do the same calculations for a frequency of 60 Hz.arrow_forwardAn AC generator with an rms emf of 15.0 V is connected in series with a 0.54-H inductor. The frequency of the source emf is 70.0 Hz. Draw a phasor diagram for this circuit, including the current, the potential difference across the inductor, and the source emf. Draw your diagram with the current phasor pointing toward the right along the horizontal axis.arrow_forwardIn a series RLC circuit with a maximum current of 0.250 A, an AC source with Vmax= 115 V operating at 60.0 Hz is connected to a 325-mH inductor, a 7.50-F capacitor, and a resistor with unknown resistance R. Draw a phasor diagram for this circuit, including the current, the potential difference across each of the circuit elements, and the source emf. Draw your diagram with the current phasor pointing upward along the vertical axis.arrow_forward
- A 40-mH inductor is connected to a 60-Hz AC source whose voltage amplitude is 50 V. If an AC voltmeter is placed across the inductor, what does it read?arrow_forwardThe emf of an ac source is given by v(t)=V0sint, where V0=100V and =200 . Find an expression that represents the output current of the source if it is connected across (a) a 20-pF capacitor, (b) a 20-mH inductor, and (c) a 50 resistor.arrow_forwardIn a purely inductive AC circuit as shown in Figure P21.15, Vmax = 100. V. (a) The maximum current is 7.50 A at 50.0 Hz. Calculate the inductance L. (b) At what angular frequency is the maximum current 2.50A? Figure p21.15arrow_forward
- An RLC series circuit consists of a 10 resistor, an 8.0F capacitor, and a 50-mH inductor. A 110-V (rms) source of variable frequency is connected across the combination. What is the power output of the source when its frequency is set to one-half the resonant frequency of the circuit?arrow_forwardAn ac source of voltage amplitude 10 V delivers electric energy at a rate of 0.80 W when its current output is 2.5 A. What is the phase angle between the emf and the current?arrow_forwardA resistor and inductor are connected in series across an ac generator. The emf of the generator is given by v(t)=V0cost , where V0=120V and =120rad/s ; also, R=400 and L = 1.5 H. (a) What Is the impedance of the circuit? (b) What is the amplitude of the current through the resistor? (C) Write an expression for the current through the resistor. (d) Write expressions representing the voltages across the resistor and across the inductor.arrow_forward
- A capacitor and a resistor are connected in series across an AC source as shown in Figure OQ33.3. After the switch is closed, which of the following statements is true? (a) The voltage across the capacitor lags the current by 90. (b) The voltage across (lie resistor is out of phase with the current. (c) The voltage across the capacitor leads the current by 90. (d) The current decreases as the frequency of the source is increased, but its peak voltage remains the same. (e) None of those statements is correct.arrow_forwardA 1.5k resistor and 30-mH inductor are connected in series, as below, across a120-V(rms)ac power source oscillating at 60-Hz frequency. (a) Find the current in the circuit. (b) Find the voltage drops across the resistor and inductor. (C) Find the impedance of the circuit. (d) Find the power dissipated in the resistor. (e) Find the power dissipated in the inductor. (1) Find the power produced by the source.arrow_forwardAt 1000 Hz, the reactance of a 5.0-mH inductor is equal to the reactance of a particular capacitor. What is the capacitance of the capacitor?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
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
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Introduction To Alternating Current; Author: Tutorials Point (India) Ltd;https://www.youtube.com/watch?v=0m142qAZZpE;License: Standard YouTube License, CC-BY