![College Physics: A Strategic Approach (3rd Edition)](https://www.bartleby.com/isbn_cover_images/9780321879721/9780321879721_largeCoverImage.gif)
College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321879721
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 25, Problem 20CQ
Old-fashioned roof-mounted television antennas were designed to pick up signals across a broad frequency range. Explain why these antennas had metal bars of many different lengths.
Expert Solution & Answer
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Students have asked these similar questions
A radio station operating at 900 kHz frequency uses a monopole antenna. The antenna length (A) if
it is equivalent to a dipole with a half wavelength is
Receiving radio antennas can be in the form of conductinglines or loops. What should the orientation of each of theseantennas be relative to a broadcasting antenna that is vertical?
Title
Two parallel wires of length 0.5 m and separation of 0.1 mm carry equal and opposite currents...
Description
Two parallel wires of length 0.5 m and separation of 0.1 mm carry equal and opposite currents (differential mode) of 100 mA at 100 MHz. An antenna with an antenna factor of 20 dB at 100 MHz is used to measure the emissions in an FCC Class B test. If the antenna is parallel to and in the plane of the wires, determine the voltage measured by a spectrum analyzer attached to the antenna. [26.8 dBµV]
Chapter 25 Solutions
College Physics: A Strategic Approach (3rd Edition)
Ch. 25 - Prob. 1CQCh. 25 - The rapid vibration accompanying the swimming...Ch. 25 - Prob. 3CQCh. 25 - Prob. 4CQCh. 25 - Prob. 5CQCh. 25 - Prob. 6CQCh. 25 - The power lines that run through your neighborhood...Ch. 25 - The magnetic flux passing through a coil of wire...Ch. 25 - There is a counterclockwise induced current in the...Ch. 25 - A magnet dropped through a clear plastic tube...
Ch. 25 - The conducting loop in Figure Q25.11 is moving...Ch. 25 - Figure Q25.12 shows two concentric, conducting...Ch. 25 - Figure Q25.13 shows conducting loops next to each...Ch. 25 - Two loops of wire are stacked vertically, one...Ch. 25 - Prob. 15CQCh. 25 - A bar magnet is pushed toward a loop of wire, as...Ch. 25 - Prob. 17CQCh. 25 - A metal wire is resting on a U-shaped conducting...Ch. 25 - Prob. 19CQCh. 25 - Old-fashioned roof-mounted television antennas...Ch. 25 - An AM radio detects the oscillating magnetic field...Ch. 25 - Prob. 22CQCh. 25 - Prob. 23CQCh. 25 - The frequency of a beam of light is increased but...Ch. 25 - Arc welding uses electric current to make an...Ch. 25 - A circular loop of wire has an area of 0.30 m2. It...Ch. 25 - In Figure Q25.27, a square loop is rotating in the...Ch. 25 - A diamond-shaped loop of wire is pulled at a...Ch. 25 - Figure Q25.29 shows a triangular loop of wire in a...Ch. 25 - A device called a flip coil can be used to measure...Ch. 25 - The electromagnetic waves that carry FM radio...Ch. 25 - The beam from a laser is focused with a lens,...Ch. 25 - A spacecraft in orbit around the moon measures its...Ch. 25 - A 6.0 mW vertically polarized laser beam passes...Ch. 25 - Communication with submerged submarines via radio...Ch. 25 - Prob. 36MCQCh. 25 - Prob. 1PCh. 25 - Prob. 2PCh. 25 - A l0-cm-long wire is pulled along a U-shaped...Ch. 25 - Figure P25.4 shows a 15-cm-long metal rod pulled...Ch. 25 - Prob. 5PCh. 25 - In the rainy season, the Amazon flows fast and...Ch. 25 - A delivery truck with 2.8-m-high aluminum sides is...Ch. 25 - Prob. 8PCh. 25 - Prob. 9PCh. 25 - Prob. 10PCh. 25 - Prob. 11PCh. 25 - At a typical location in the United States, the...Ch. 25 - Prob. 13PCh. 25 - A magnet and a coil are oriented as shown in...Ch. 25 - A 1000-turn coil of wire 2.0 cm in diameter is in...Ch. 25 - Figure P25.I6 shows a 100-turn coil of wire of...Ch. 25 - Figure P25.17 shows a 10-cm-diameter loop in three...Ch. 25 - The plane of a loop of wire is perpendicular to a...Ch. 25 - Prob. 19PCh. 25 - Prob. 20PCh. 25 - Prob. 21PCh. 25 - A 5.0-cm-diameter loop of wire has resistance 1.2...Ch. 25 - Prob. 23PCh. 25 - Prob. 24PCh. 25 - Prob. 25PCh. 25 - Prob. 26PCh. 25 - A microwave oven operates at 2.4 GHz with an...Ch. 25 - The maximum allowed leakage of microwave radiation...Ch. 25 - Prob. 29PCh. 25 - Prob. 30PCh. 25 - At what distance from a 10 mW point source of...Ch. 25 - Prob. 32PCh. 25 - A radio antenna broadcasts a 1.0 MHz radio wave...Ch. 25 - A 200 MW laser pulse is focused with a lens to a...Ch. 25 - The intensity of a polarized electromagnetic wave...Ch. 25 - Prob. 36PCh. 25 - Prob. 37PCh. 25 - Prob. 38PCh. 25 - The polarization of a helium-neon laser can change...Ch. 25 - Prob. 40PCh. 25 - Prob. 41PCh. 25 - Prob. 42PCh. 25 - One recent study has shown that x rays with a...Ch. 25 - Prob. 44PCh. 25 - Prob. 45PCh. 25 - Prob. 46PCh. 25 - Prob. 47PCh. 25 - Prob. 48PCh. 25 - Prob. 49PCh. 25 - A particular species of copepod, a small marine...Ch. 25 - Prob. 51PCh. 25 - Prob. 52PCh. 25 - While using a dimmer switch to investigate a new...Ch. 25 - Prob. 54PCh. 25 - Prob. 55PCh. 25 - A python can detect thermal radiation with...Ch. 25 - If astronomers look toward any point in outer...Ch. 25 - A 100-turn, 2.0-cm diameter coil is at rest in a...Ch. 25 - A 25-turn, 10.0-cm-diameter coil is oriented in a...Ch. 25 - People immersed in strong unchanging magnetic...Ch. 25 - Prob. 61GPCh. 25 - Prob. 62GPCh. 25 - A 20-cm-long, zero-resistance wire is pulled...Ch. 25 - A TMS (transeranial magnetic stimulation) device...Ch. 25 - The 10-cm-wide, zero-resistance wire shown in...Ch. 25 - Experiments to study vision often need to track...Ch. 25 - A LASIK vision correction system uses a laser that...Ch. 25 - When the Voyager 2 spacecraft passed Neptune in...Ch. 25 - A new cordless phone emits 4.0 mW at 5.8 GHz. The...Ch. 25 - In reading the instruction manual that came with...Ch. 25 - Unpolarized light passes through a vertical...Ch. 25 - Prob. 73GPCh. 25 - Prob. 74GPCh. 25 - What is the wavelength of 27 MHz radio waves? A....Ch. 25 - If the frequency of the radio waves is increased,...Ch. 25 - Prob. 77MSPPCh. 25 - The metal detector will not detect insulators...Ch. 25 - A metal detector can detect the presence of metal...Ch. 25 - Which of the following changes would not produce a...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Using the definitions in Eqs. 1.1 and 1.4, and appropriate diagrams, show that the dot product and cross produc...
Introduction to Electrodynamics
Write each number in scientific notation.
20. 0.000000000000000618
Applied Physics (11th Edition)
1. When is energy most evident?
Conceptual Physics (12th Edition)
Impact Energy. Consider a comet about 2 kilometers across with a mass of 4 × 1012 kg. Assume that it crashes in...
Life in the Universe (4th Edition)
Comparing the visible and the infrared types of light, which would you say has an easier time getting through o...
Lecture- Tutorials for Introductory Astronomy
26.7 For the circuit shown in Fig. E26.7 find the reading of the idealized ammeter if the battery has an intern...
University Physics (14th 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
- Give your explanation of how a microwave oven works. Have you ever noticed interference with your wireless connection when the microwave is on and your wireless device is near the microwave?arrow_forwardThe antenna used in a car has an approximate length of about 75 cm typically oriented vertically. Comment on such antenna design and its efficiency in receiving AM and FM channelsarrow_forwardIn reading the instruction manual that came with your garage-door opener, you see that the transmitter unit in your car produces a 250 mW signal and that the receiver unit is supposed to respond to a radio wave of the correct frequency if the electric field amplitude exceeds 0.10 V/m. You wonder if this is really true. To find out, you put fresh batteries in the transmitter and start walking away from your garage while opening and closing the door. Your garage door finally fails to respond when you’re 42 m away. Are the manufacturer’s claims true?arrow_forward
- High microwave intensities can cause biological damage through heating of tissue; a particular concern is cataract formation. The U.S. Food and Drug Administration limits microwave radiation near the door of a microwave oven to 5.0 mW/m2. The window in a particular oven door measures 40 cm by 17 cm and is covered with a metal screen to block microwaves. Assuming power leaks uniformly through the window area, what percent of the oven’s 900-W microwave power can leak without exceeding the FDA standards?arrow_forward. Starting in 2009, TV stations in the U.S. switched to digitalsignals. To watch today’s digital broadcast TV, could you use a pre-2009 TV antenna meant for analog? Explain.(a) No; analog antennas do not receive digital signals.(b) No; digital signals are broadcast at differentfrequencies, so you need a different antenna.(c) Yes; digital signals are broadcast with the same carrierfrequencies, so your old antenna will be fine.(d) No; you cannot receive digital signals through anantenna and need to switch to cable or satellite.arrow_forwardWhat are the wavelength ranges in (a) the AM radio band(540–1 600 kHz) and (b) the FM radio band (88–108 MHz)?arrow_forward
- Your favorite radio program broadcasts 96.3 MHz. What is the wavelength corresponding to this broadcast? Theoretically, the antenna of your radio is half of the wavelength of the radio waves. How long should the antenna be for this frequency?arrow_forwardSuppose a (radio) dish antenna has a diameter of 100m (as e.g. an antenna that exists close to Bonn, Germany). If this antenna receives a radio signal with an electric field of 1µV /m and a magnetic field of 3.3 × 10−15T what is the power received by the antenna if it absorbs all the energy?arrow_forwardAn FM radio station broadcasts at a frequency of 100 MHz. What inductance should be paired with a 10 pF capacitor to build a receiver circuit for this station?arrow_forward
- An antenna is designed with a center frequency of 9.35 GHz. If the lowest frequency versus the lowest standing wave ratio is 5 GHz 8, and the highest frequency versus the lowest standing wave ratio is 5 GHz 10, the bandwidth of this antenna is O 21.39 150.12 64.8 80arrow_forwardWhat is the maximum power level of a radio station so asto avoid electrical breakdown of air at a distance of 0.65 mfrom the transmitting antenna? Assume the antenna is apoint source. Air breaks down in an electric field of about 3 x106 v/m?arrow_forwardThe wavelengths of AM radio waves are so long—more than 200 m—that it would be impractical to make a (1)/(4) wavelength antenna to detect their electric field. Instead, AM radios detect the magnetic field of the wave using a coil of wire. The changing flux of the wave’s magnetic field induces an emf in the coil that is detected and amplified by the receiver. If you are standing to the west of an AM station that is broadcasting a vertically polarized wave, in which direction should the axis of the coil be oriented in order to best detect the wave?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax CollegeGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
- 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 Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168161/9781938168161_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168000/9781938168000_smallCoverImage.gif)
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
![Text book image](https://www.bartleby.com/isbn_cover_images/9780078807213/9780078807213_smallCoverImage.gif)
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
![Text book image](https://www.bartleby.com/isbn_cover_images/9781133104261/9781133104261_smallCoverImage.gif)
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781133939146/9781133939146_smallCoverImage.gif)
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
What Are Electromagnetic Wave Properties? | Physics in Motion; Author: GPB Education;https://www.youtube.com/watch?v=ftyxZBxBexI;License: Standard YouTube License, CC-BY