University Physics Volume 2
18th Edition
ISBN: 9781938168161
Author: OpenStax
Publisher: OpenStax
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 15, Problem 9CQ
Why do transmission lines operate at very hig1 voltages while household circuits operate at fairly small voltages?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
. An RC circuit with a 54.0 V power source is connected to a fluorescent lamp as shown in the
ngure. The lamp L turns on when the voltage across the capacitor reaches 45.0V, which
happens after 0.65 seconds after the switch is closed. If R =
the capacitance C? (b) If we must switch the lamps 3 times in a second, what should be the
value of capacitance? (c) What is the charge on the capacitor when the lamp just flashes in
3MQ, (a) what is the value of
both the cases?
ww
R
54.0V
In an old house, the wires leading to a 120 V outlet have a total resistance of 0.45 Ω . When you plug in a hair dryer, it draws a 10.0 A current.
How much does the outlet voltage decrease due to the voltage drop across the wires?
What is the power dissipated as heat in the wires?
A coffee maker is rated at 1200 W, a toaster at 1100 W, and a waffle maker at 1400 W. The three appliances are connected in parallel to a common 120 V household circuit.
What is the current in each appliance when operating independently?
What total current is delivered to the appliances when all are operating simultaneously?
Is a 15A circuit breaker sufficient in this situation? Explain.
Chapter 15 Solutions
University Physics Volume 2
Ch. 15 - Check Your Understanding If a European ac voltage...Ch. 15 - Check Your Understanding Repeat Example 15.1 for...Ch. 15 - Check Your Understanding Find the voltages across...Ch. 15 - Check Your Understanding An ac voltmeter attached...Ch. 15 - Check Your Understanding Show that the tins...Ch. 15 - Check Your Understanding In the circuit of Figure...Ch. 15 - Check Your Understanding What happens to the...Ch. 15 - Check Your Understanding The resonant angular...Ch. 15 - Check Your Understanding A transformer steps the...Ch. 15 - What is the relationship between frequency and...
Ch. 15 - Explain why at high frequencies a capacitor acts...Ch. 15 - In an RLC series circuit, can the voltage measured...Ch. 15 - For what value of the phase angle between the...Ch. 15 - Discuss the differences between average power and...Ch. 15 - The average ac current delivered to a circuit is...Ch. 15 - Can the instantaneous power output of an ac source...Ch. 15 - The power rating of a resistor used in ac circuits...Ch. 15 - Why do transmission lines operate at very hig1...Ch. 15 - How can you distinguish the primary winding from...Ch. 15 - Battery packs in some electronic devices are...Ch. 15 - Will a transformer work if the input is a dc...Ch. 15 - Why are the primary and secondary coils of a...Ch. 15 - Write an expression for the output voltage of an...Ch. 15 - Calculate the reactance of a 5.0F capacitor at (a)...Ch. 15 - What is the capacitance of a capacitor whose...Ch. 15 - Calculate the reactance of a 5.0-mH inductor at...Ch. 15 - What is the self-inductance of a coil whose...Ch. 15 - At s1iat frequency is the reactance of a 20F...Ch. 15 - At 1000 Hz, the reactance of a 5.0-mH inductor is...Ch. 15 - A 50resistor is connected across the emf...Ch. 15 - A 25F capacitor is connected to an emf given by...Ch. 15 - A 100-mH inductor is connected across the emf of...Ch. 15 - What is the impedance of a series combination of a...Ch. 15 - A resistor and capacitor are connected in series...Ch. 15 - A resistor and inductor are connected in series...Ch. 15 - In an RLC series circuit, the voltage amplitude...Ch. 15 - An PLC series circuit with R=600 , L = 30 mH. and...Ch. 15 - For the cucu3t shown below, what are (a) the total...Ch. 15 - The emf of an ac source is given by v(t)=v0sint....Ch. 15 - Calculate the rms currents for an ac source is...Ch. 15 - A 40-mH inductor is connected to a 60-Hz AC source...Ch. 15 - For an RLC series circuit, the voltage amplitude...Ch. 15 - An ac source of voltage amplitude 10 V delivers...Ch. 15 - An RLC series circuit has an impedance of 60 and a...Ch. 15 - Calculate the resonant angular freqency of an RLC...Ch. 15 - The resonant frequency of RLC series circuits is...Ch. 15 - (a) What is the resonant frequency of an RLC...Ch. 15 - For an RLC series circuit, R=100 , L = 150 mH, and...Ch. 15 - An ac source of voltage amplitude 100 V and...Ch. 15 - (a) What is the resonant frequency of a resistor,...Ch. 15 - Suppose a coil has a self-inductance of 20.0 H and...Ch. 15 - An ac generator is connected to a device whose...Ch. 15 - A step-up transformer is designed so that the...Ch. 15 - A step-up transformer connected to a 100-V line U...Ch. 15 - An ac source of emf delivers 5.0 mW of power at an...Ch. 15 - A transformer is used to down 110 V from a wall...Ch. 15 - A transformer is used to supply a 12-V model train...Ch. 15 - The emf of an ac source is given by v(t)=V0sint,...Ch. 15 - A 700-pF capacitor is connected across an ac...Ch. 15 - A 20-mH inductor is connected across an AC source...Ch. 15 - A 30F capacitor is connected across a 60-Hz ac...Ch. 15 - A 7.0-mH induct is connected across a 60-Hz ac...Ch. 15 - What is the impedance of an RLC series circuit at...Ch. 15 - What is the resistance R in the circuit shown...Ch. 15 - An ac source of voltage amplitude 100 V and...Ch. 15 - In an RLC series circuit, R=200,L=1.0H ,...Ch. 15 - A power plant generator produces 100 A at 15 kV...Ch. 15 - Consider a power plant located 25 km outside a...Ch. 15 - Neon signs require 12-kV for their operation. A...Ch. 15 - The 335-kV ac electricity from a power...Ch. 15 - A 1.5k resistor and 30-mH inductor are connected...Ch. 15 - A 20 resistor, 50F capacitor, and 30-mH inductor...Ch. 15 - A 200- resistor, 150- F capacitor, and 23-H...Ch. 15 - Find the reactances of the following capacitors...Ch. 15 - An output impedance of an audio amplifier has an...Ch. 15 - Show that the SI unit for capacitive reactance is...Ch. 15 - A coil with a self-inductance of 16 mH and a...Ch. 15 - An RLC series circuit consists of a 50 resistor, a...Ch. 15 - An RLC series circuit consists of a 10 resistor,...Ch. 15 - Shown below are two circuits that act as crude...Ch. 15 - The two circuits shown below act as crude low-pass...
Additional Science Textbook Solutions
Find more solutions based on key concepts
You rev your cars engine and watch the tachometer climb steadily from 1200 rpm to 5500 rpm in 2.7 s. What are (...
Essential University Physics (3rd Edition)
Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) desi...
The Cosmic Perspective Fundamentals (2nd Edition)
Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) desi...
Cosmic Perspective Fundamentals
A magnet sitting next to a wire does not induce a current in the wire.
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
36.38 Monochromatic light with wavelength 490 nm passes through a circular aperture, and a diffraction pattern ...
University Physics with Modern Physics (14th Edition)
What do these two structures have in common?
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
- Your cellphone typically consumes 400mW of power while used t text. If the phone is operated using a battery with voltage of 3.6 V, what is the current flowing through the cell phone circuitry under these circumstances?arrow_forwardYour cell phone typically consumes about 410 mW of power when you text a friend. If the phone is operated using a lithium-ion battery with a voltage of 3.7 V, what is the current (in A) flowing through the cell-phone circuitry under these circumstances?arrow_forwardPlz explain in detail asaparrow_forward
- how do i solve this question? see attached figure. What is the emf frequency f? What is the value of the capacitance C?arrow_forwardAn A.c has a peak voltage of 42.5V fed to a 100 ohm resistor. What is the average power dissipated in the resistor ?arrow_forwardGiven the equation, V =Voe-(2.6x1 )t, at what time will %3D oe the voltage drop by its original value? Select one: a. t= 2566 s b. t= 2666 s C. t= 2746 s d. t 2646 s Given the equation, V – Vne RC what size of resistor would be %3D required to drop the voltage on a 250µF capacitor to its original voltage in 2 min.? Select one: a. R= 470 k2 b. R= 450 k 2 %3D R = 460 k2 С. d. R= 440 karrow_forward
- Will the circuit breaker trip?arrow_forwardSolve the question asap.arrow_forwardPS 2: A 12-volt battery of internal resistance r of 0.05 ohm is to be recharged u, source at the rate of 8 amperes. 30-volt dc a. What resistance R is to be connected in series with the circuit? ANSWER: b. What is the terminal voltage of the battery? c. How much energy in joules is dissipated in the resistor in one hour ? ANSWER: ANSWER:arrow_forward
- A capacitor, C, is (fully) charged by connecting it to a 7 Volt EMF and then is allowed to dischargethrough a 2 Ω resistor as shown in the Figure. What is the current, I, in the circuit (in A) when thestored energy in the capacitor has dropped to 30% of its initial value?arrow_forwardA sawmill is located 15 miles away and fed at 25kV through a distribution line with 1/0 ACSR construction. The peak load at the sawmill is 1500kW at 0.866 pf. There is a small (500kW and 0.95 pf) commercial enterprise outside the sawmill property, but this is the only other load on the extension. If you consider only line resistance, calculate the voltage drop when the sawmill and the commercial enterprise are both at peak load. 100 T Select one: O a. O b. 320 V O c. 466 V O d. 799 V 1202 V 15 miles 1/0 ASCR 14.4 KV25 KV 500 KV 0.95 p Sa wm 1500 KV 0.866 ofarrow_forwardThe following appliances are connected to a single 120 V, 15 A circuit in a kitchen: a 330 W blender, a 1000 W coffeepot, a 150 W coffee grinder, and a 750 W microwave oven. If these are all turned on at the same time, will they trip the circuit breaker?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
How To Solve Any Resistors In Series and Parallel Combination Circuit Problems in Physics; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=eFlJy0cPbsY;License: Standard YouTube License, CC-BY