COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 21, Problem 8QAP
To determine
Why PCBs are used to fill the interior of transformers.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Hybrid vehicles are powered by a gasoline engine paired with an electric motor and batteries. Hybrids get much better mileage in the stop and go of city driving than conventional vehicles do. When you brake to a stop in a conventional car, friction converts the kinetic energy of the car’s motion into thermal energy in the brakes. In a typical hybrid car, depressing the brake pedal will connect a generator that converts much of the car’s kinetic energyinto chemical energy in a battery. Explain how this makes a hybrid vehicle more efficient.
Mr X and Mr Y are two friends. One day they were walking on the street and saw that a man in a strange dress had shown many magical activities. He introduced a crystal that turned on the LED light by giving pressure on it. Everyone was surprised by that activities. But Mr Y said that this crystal is a piezoelectric transducer and is also known as a self-transducer. However, it can't generate high voltage. Could you explain what the main reasons for generating the low output voltage are?
28. Reduce the circuit between terminals A and B in Figure 8-83 to its Norton equivalent.
H
Foll
R₁
22 ΚΩ
R₂
8.2 ΚΩ
www
R₂
15 ΚΩ
www
Is
10 mA
R₂
10 ΚΩ
Message weekCHI...
A
OB
Chapter 21 Solutions
COLLEGE PHYSICS
Ch. 21 - Prob. 1QAPCh. 21 - Prob. 2QAPCh. 21 - Prob. 3QAPCh. 21 - Prob. 4QAPCh. 21 - Prob. 5QAPCh. 21 - Prob. 6QAPCh. 21 - Prob. 7QAPCh. 21 - Prob. 8QAPCh. 21 - Prob. 9QAPCh. 21 - Prob. 10QAP
Ch. 21 - Prob. 11QAPCh. 21 - Prob. 12QAPCh. 21 - Prob. 13QAPCh. 21 - Prob. 14QAPCh. 21 - Prob. 15QAPCh. 21 - Prob. 16QAPCh. 21 - Prob. 17QAPCh. 21 - Prob. 18QAPCh. 21 - Prob. 19QAPCh. 21 - Prob. 20QAPCh. 21 - Prob. 21QAPCh. 21 - Prob. 22QAPCh. 21 - Prob. 23QAPCh. 21 - Prob. 24QAPCh. 21 - Prob. 25QAPCh. 21 - Prob. 26QAPCh. 21 - Prob. 27QAPCh. 21 - Prob. 28QAPCh. 21 - Prob. 29QAPCh. 21 - Prob. 30QAPCh. 21 - Prob. 31QAPCh. 21 - Prob. 32QAPCh. 21 - Prob. 33QAPCh. 21 - Prob. 34QAPCh. 21 - Prob. 35QAPCh. 21 - Prob. 36QAPCh. 21 - Prob. 37QAPCh. 21 - Prob. 38QAPCh. 21 - Prob. 39QAPCh. 21 - Prob. 40QAPCh. 21 - Prob. 41QAPCh. 21 - Prob. 42QAPCh. 21 - Prob. 43QAPCh. 21 - Prob. 44QAPCh. 21 - Prob. 45QAPCh. 21 - Prob. 46QAPCh. 21 - Prob. 47QAPCh. 21 - Prob. 48QAPCh. 21 - Prob. 49QAPCh. 21 - Prob. 50QAPCh. 21 - Prob. 51QAPCh. 21 - Prob. 52QAPCh. 21 - Prob. 53QAPCh. 21 - Prob. 54QAPCh. 21 - Prob. 55QAPCh. 21 - Prob. 56QAPCh. 21 - Prob. 57QAPCh. 21 - Prob. 58QAPCh. 21 - Prob. 59QAPCh. 21 - Prob. 60QAPCh. 21 - Prob. 61QAPCh. 21 - Prob. 62QAPCh. 21 - Prob. 63QAPCh. 21 - Prob. 64QAPCh. 21 - Prob. 65QAPCh. 21 - Prob. 66QAPCh. 21 - Prob. 67QAPCh. 21 - Prob. 68QAPCh. 21 - Prob. 69QAPCh. 21 - Prob. 70QAPCh. 21 - Prob. 71QAPCh. 21 - Prob. 72QAPCh. 21 - Prob. 73QAPCh. 21 - Prob. 74QAPCh. 21 - Prob. 75QAPCh. 21 - Prob. 76QAPCh. 21 - Prob. 77QAPCh. 21 - Prob. 78QAPCh. 21 - Prob. 79QAPCh. 21 - Prob. 80QAPCh. 21 - Prob. 81QAPCh. 21 - Prob. 82QAPCh. 21 - Prob. 83QAPCh. 21 - Prob. 84QAPCh. 21 - Prob. 85QAP
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
- You are part of a team working in a machine parts mechanics shop. An important customer has asked your company to provide springs with a very precise force constant k. You dense the electrical circuit shown in Figure P25.45 to measure the spring constant of each of the springs to be provided to the customer. The circuit consists of two identical, parallel metal plates free to move, other than being connected to identical metal springs, a switch, and a battery with terminal voltage V. With the switch open, the plates are uncharged, are separated by a distance d, and have a capacitance C. When the switch is closed, the plates become charged and attract each other. The distance between the plates changes by a factor f, after which the plates are in equilibrium between the spring forces and the attractive electric force between the plates. To keep the plates from going into oscillations, you hold each plate with insulating gloves as the switch is closed and apply a force on the plates that allows them to move together at a slow constant speed until they are at the equilibrium separation, at which point you can release the plates. You determine an expression for the spring constant in terms of C, d, V, and f. Figure P25.45 Problems 45 and 50.arrow_forwardYou have been called in as an expert witness in a civil case. The case involves a dispute between neighbors. The plaintiff neighbor is complaining about a buzzing noise during the night that prevents the plaintiff from sleeping. He claims that the buzzing is coming from a light fixture on the defendants porch ceiling. The defendant likes to do installations and repairs himself and has done a sloppy job of installing the light fixture. The fixture hangs vertically from a single wire that is attached through the porch ceiling and down the wall to one connector in a nearby electrical outlet. The second wire is hung horizontally with strings at the level of the light and then runs down the wall to the other connector in the outlet. The defendant leaves the light on all night long for security. Recalling his high school physics, the plaintiff states that the combination of the 60-Hz household voltage and the magnetic field of the Earth results in an oscillating driving force on the single wire from which the light fixture hangs vertically. This, in turn, sets up a standing wave in the wire, and that is the cause of the buzz. You have been hired by the defense attorney. Upon hearing the details of the case, you obtain permission from the defendant and make measurements. The mass of the light fixture is 17.5 kg. The vertical wire from which it hangs is 0.150 m long and has a mass of 0.030 kg. Is the plaintiff correct that the magnetic field of the Earth is causing the buzzing of the wire? Ignore any effect of the second wire.arrow_forwardIntegrated Concepts (a) What voltage will accelerate electrons to a speed of 6.00107m/s ? (b) Find the radius of curvature of the path of a proton accelerated through this potential in a 0.500-T field and compare this with the radius of curvature of an electron accelerated through the same potential.arrow_forward
- Review. A molecule of DNA (deoxyribonucleic acid) is 2.17 m long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.00% upon becoming charged. Determine the effective spring constant of the molecule.arrow_forwardThe immediate cause of many deaths is ventricular fibrillation, which is an uncoordinated quivering of the heart. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart sometimes resumes its proper beating. One type of defibrillator (chapter-opening photo, page 777) applies a strong electric shock to the chest over a time interval of a few milliseconds. This device contains a capacitor of several microfarads, charged to several thousand volts. Electrodes called paddles are held against the chest on both sides of tire heart, and the capacitor is discharged through the patient's chest. Assume an energy of 300 J is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forward(a) Why are fish reasonably safe in an electrical storm? (b) Why are swimmers nonetheless ordered to get out of the water in the same circumstance?arrow_forward
- In places such as hospital operating rooms or factories for electronic circuit boards, electric sparks must be avoided. A prison standing on a grounded floor and touching nothing else can typically have a body capacitance of 150 pF, in parallel with a foot capacitance of 80.0 pF produced by the dielectric soles of his or her shoes. The person acquires static electric charge from interactions with Ills or her surroundings. The static charge flows to ground through the equivalent resistance of the two shoe soles in parallel with each other. A pair of rubber-soled street shoes can present an equivalent resistance of 5.00 103 M. A pair of shoes with special static-dissipative soles can have an equivalent resistance of 1.00 M. Consider the persons body and shoes as forming an RC circuit with the ground. (a) How long does it take the rubber-soled shoes to reduce a persons potential from 3.00 103 V to 100? (b) How long does it take the static-dissipative shoes to do the same thing?arrow_forwardA supermarket sells rolls of aluminum foil, plastic wrap, and waxed paper. (a) Describe a capacitor made from such materials. Compute order-of-magnitude estimates for (b) its capacitance and (c) its breakdown voltage.arrow_forwardSome physical systems possessing capacitance continuously distributed over space can be modeled as an infinite array of discrete circuit elements. Examples are a microwave waveguide and the axon of a nerve cell. To practice analysis of an infinite array, determine the equivalent capacitance C between terminals X and Y of the infinite set of capacitors represented in Figure P25.47. Each capacitor has capacitance C0. Suggestions: Imagine that the ladder is cut at the line AB and note that the equivalent capacitance of the infinite section to the right of AB is also C.arrow_forward
- 39. Consider the circuit shown below. Find V1, V2, and R4. 1, = 4 A R1 = 6 N V1 2 = 3 A 13 = 1 A %3| %3D R2 = 4 N R3 = 6 N %3D I5 = 3 A = 2 A +1 V2 RA 6 = 1 A R5 = 4 Narrow_forward1. A capacitor is composed of 2 plates separated by a sheet of insulating material 2mm thick and of relative permittivity 3. The distance between the plates is increased to allow the insertion of a second sheet of 3mm thick and of relative permittivity & If the equivalent capacitance is one-half of the original capacitance, find the value of ɛr. 2. In the given network, each capacitor has C = 4.00 µF and V ab +28.0 V. Calculate the: a. Total capacitance b. Charge on each capacitor c. Potential difference on each capacitor C4 3. A 20 µF capacitor is charged to 120 V and then disconnected from the power supply. If a second uncharged capacitor with capacitance of 50 µF is connected across the first capacitor, what would be the resulting voltage across their parallel combination? 4. A parallel-plate capacitor in air has a plate separation of 1.35 cm and a plate area of 35.0 cm2. The plates are charged to a potential difference of 150 V and disconnected from the source. The capacitor is…arrow_forwardWhich one of the following combinations of units is equivalent to the ohm? A. V/C B. A/J C. J/s D. J×s/C2 E. W/Aarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
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
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
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
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Introduction To Alternating Current; Author: Tutorials Point (India) Ltd;https://www.youtube.com/watch?v=0m142qAZZpE;License: Standard YouTube License, CC-BY