Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 28.6, Problem 28.6GI
A distribution line in a city supplies AC power at 7.2 kV to a transformer that steps it down to 240 V for an individual home. If the current in the transformer’s primary is 1.5 A, the current flowing to the home is approximately (a) 3.0 A, (b) 1.5 A, (c) 240 A, or (d) 45 A.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 360 kV. The secondary coil of this transformer is being replaced so that its output can be 740 kV for more efficient cross-country transmission on upgraded transmission lines.
If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what is the power loss, in watts, in the new power lines which leave the plant?
A toroidal solenoid has a magnitude of induced emf of 10.3 [mV] when the rate of change of the current is 0.0250 [A/s]. How many turns does it have if the average flux through each turn is 0.00145 [Wb] when the current is 1.12 [A]?
A transformer has 100 turns in its primary coil and 2000 turns in its secondary coil. The emf in the primary is 12 V and the total resistance in the secondary is 1000 ohm
calculate (i) the emf in the secondary coil. (ii) the current in the secondary coil, (iii) the current in the primary coil. Assume that the transformer is ideal.
Chapter 28 Solutions
Essential University Physics (3rd Edition)
Ch. 28.1 - What are the peak voltage and angular frequency of...Ch. 28.2 - Prob. 28.2GICh. 28.3 - You have an LC circuit that oscillates at a...Ch. 28.4 - You measure the capacitor and inductor voltages in...Ch. 28.5 - A resistor and capacitor are connected in series...Ch. 28.6 - A distribution line in a city supplies AC power at...Ch. 28 - Two AC signals have the same amplitude but...Ch. 28 - Whats meant by the statement, A capacitor acts...Ch. 28 - Theres an insulating gap between capacitor plates,...Ch. 28 - Why does it make sense that inductive reactance...
Ch. 28 - The same AC voltage appears across a capacitor and...Ch. 28 - When a particular inductor and capacitor are...Ch. 28 - An inductor and capacitor are connected in series...Ch. 28 - When the capacitor voltage in an undriven LC...Ch. 28 - Why is Equation 28.5 not a full description of the...Ch. 28 - The applied voltage in a series RLC circuit lags...Ch. 28 - The voltage across two components in series is...Ch. 28 - If you measure the rms voltages across the...Ch. 28 - A step-up transformer increases voltage, or energy...Ch. 28 - Much of Europe uses AC power at 230 V rms and 50...Ch. 28 - An industrial electric motor runs at 208 V rms and...Ch. 28 - An AC current is given by I = 495 sin(9.43t), with...Ch. 28 - Prob. 17ECh. 28 - Find the rms current in a 1.0-F capacitor...Ch. 28 - A 470- resistor, 10-F capacitor, and 750-mH...Ch. 28 - Find the reactance of a 3.3-F capacitor at (a) 60...Ch. 28 - A 15-F capacitor carries 1.4 A rms. Whats its...Ch. 28 - A capacitor and a 1.8-k resistor pass the same...Ch. 28 - A 50-mH inductor is connected across a 10-V rms AC...Ch. 28 - Find the resonant frequency of an LC circuit...Ch. 28 - An LC circuit with C = 18 mF undergoes...Ch. 28 - Your sister whos building the radio (Chapter 27...Ch. 28 - An LC circuit with a 20-F capacitor oscillates...Ch. 28 - A series RLC circuit has R = 75 k, L = 20 mH, and...Ch. 28 - Find the impedance at 10 kHz of a circuit...Ch. 28 - A series RLC circuit has R = 18 k, C = 14 F, and L...Ch. 28 - If the peak voltage applied to produce the curves...Ch. 28 - An electric drill draws 4.6 A rms at 120 V rms. If...Ch. 28 - A 40-W fluorescent lamp has power factor 0.85 and...Ch. 28 - An electric water heater draws 20 A rms at 240 V...Ch. 28 - For safety, medical equipment connected to...Ch. 28 - Youre planning a semester in China, so you want to...Ch. 28 - (a) A 2.2-H inductor is connected across 120-V...Ch. 28 - A 2.0-F capacitor has 1.0-k reactance. (a) Whats...Ch. 28 - Show that the unit of both capacitive and...Ch. 28 - Electroencephalography (EEG) elucidates brain...Ch. 28 - At 15 kHz an inductor has 12 times the reactance...Ch. 28 - A 0.75-H inductor is in series with a fluorescent...Ch. 28 - A 2.2-nF capacitor and one of unknown capacitance...Ch. 28 - Connections to the body for electrocardiography...Ch. 28 - The FM radio band covers the frequency range 88108...Ch. 28 - An LC circuit includes a 0.025-F capacitor and a...Ch. 28 - One-eighth of a cycle after the capacitor in an LC...Ch. 28 - The 2420-F capacitor in Fig. 28.25 is initially...Ch. 28 - A damped LC circuit consists of a 0.15-F capacitor...Ch. 28 - A damped RLC circuit includes a 5.0- resistor and...Ch. 28 - An RLC circuit includes a 1.5-H inductor and a...Ch. 28 - The table below shows the ratio of peak voltage to...Ch. 28 - Figure 28.26 shows the phasor diagram for an RLC...Ch. 28 - An AC voltage of fixed amplitude is applied across...Ch. 28 - A series RLC circuit has resistance 127 and...Ch. 28 - A series RLC circuit has power factor 0.764 and...Ch. 28 - Youre Chief Financial Officer for a power company,...Ch. 28 - A car-battery charger runs off the 120-V rms AC...Ch. 28 - A power supply like that of Fig. 28.23 is supposed...Ch. 28 - An RLC circuit includes a 3.3-F capacitor and a...Ch. 28 - A series RLC circuit with R = 1.3 , L = 27 mH, and...Ch. 28 - Differentiate Equation 28.9 to find the current in...Ch. 28 - Find a second frequency where the current in the...Ch. 28 - Two capacitors are connected in parallel across a...Ch. 28 - A black box has two input connections and two...Ch. 28 - A series RLC circuit with R = 47 , L = 250 mH, and...Ch. 28 - A sine-wave generator with 20-V peak output is...Ch. 28 - For RLC circuits in which the resistance isnt too...Ch. 28 - A triangle wave swings linearly between voltages...Ch. 28 - Substitute the expression for q(t) in Equation...Ch. 28 - Although the maximum current flows in the speaker...Ch. 28 - Your professor tells you about the days before...Ch. 28 - A filter is a circuit designed to pass AC signals...Ch. 28 - A filter is a circuit designed to pass AC signals...Ch. 28 - A filter is a circuit designed to pass AC signals...Ch. 28 - A filter is a circuit designed to pass AC signals...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Particles of light have no mass. Does the Sun’s mass change as a result of all the light it emits? Explain.
Modern Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
1. When is energy most evident?
Conceptual Physics (12th Edition)
52. You are target shooting using a toy gun that fires a small ball at a speed of 15 m/s. When the gun is fire...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Whether it is possible to drive a car in such a way that the tangential acceleration is nonzero while at the sa...
Physics (5th Edition)
When it is summer in the Southern Hemisphere, why it is winter in the Northern Hemisphere?
Conceptual Integrated Science
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
- Suppose that a rectangular toroid has 2000 windings and a self-inductance of 0.040 H. If h = 0.10 m, what is the current flowing through a rectangular toroid when the energy in its magnetic field is 2.0 × 10-6 J?arrow_forwardSuppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 360 kV. The secondary coil of this transformer is being replaced so that its output can be 740 kV for more efficient cross-country transmission on upgraded transmission lines. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the old power lines which left the plant?arrow_forwardA transformer is to be used to step up voltage from an alternating current source from 120 V to 1800 V. If the primary has 170 turns, then the number of turns in the secondary is A. 20.B. 660.C. 720.D. 2550E. 6600.arrow_forward
- A transformer has 20 turns of wire in its primary coil and 50 turns of wire in its secondary coil. If the peak current in the primary coil is 8.0 A, what is the peak current in the secondary coil? a. 4.6 A b. 8.7 A c. 20 A d. 12 A e. 3.2 Aarrow_forwardIn an AC generator, the magnetic field between the pole faces of the magnet is uniform and of strength 12 T, while the 400-cm2-area loop has 300 turns. What must be the frequency in Hz of the rotating loop so that the peak voltage from the generator is 100 kvolts? a. 70 Hz b. 90 Hz c. 50 Hz d. 110 Hz e. 130 Hzarrow_forwardA 2 kV/250 V transformer has 50 turns on the secondary winding, then the number of turns on the primary winding is, 6.25 2000 250 400arrow_forward
- A 12 H inductor carries a current of 2.0 A.At what rate must the current be changed to produce a 60 V emf in the inductor?arrow_forwardA 24-V battery is connected in series with a resistor and an inductor, with R = 8.0 V and L = 4.0 H, respectively. Find the energy stored in the inductor (a) when the current reaches its maximum value and (b) one time constant after the switch is closed.arrow_forwardA generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency ff. The internal resistance of the coil is R and the cross sectional area of the coil is A. Which of the following statements are True/False? 1. The maximum induced EMF doubles if the resistance RR is doubled: True OR False 2. The maximum induced EMF doubles if the frequency ff is doubled: True OR False 3. The maximum induced EMF doubles if the area AA is doubled: True OR False 4. The maximum induced EMF doubles if the magnetic field B is doubled: True OR False 5. The maximum induced EMF occurs when the rotated coil is perpendicular to the magnetic field: True OR False pPlease answer all subparts for like either dislike is ready...arrow_forward
- A coil with an inductance of 2.6 H and a resistance of 8.2 Ω is suddenly connected to an ideal battery with ε = 110 V. At 0.14 s after the connection is made, what is the rate at which (a) energy is being stored in the magnetic field, (b) thermal energy is appearing in the resistance, and (c) energy is being delivered by the battery?arrow_forwardA simple AC generator consists of 20 coils of wire with an area of 1 000 cm2 and placed in a region where the magnetic field is 0.5 T. How long will it generate a peak electromotive force of 220 V?arrow_forward* _An ideal step-down transformer operates at a 7 kV line and a load current of 140 A. The ratio of primary and secondary windings is 35: 4. Calculate (a) (b) (©) (d) 324 204 16 A 84arrow_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 LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
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