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Two radio antennas are separated by 2.0 m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 10 m, how many maxima will you detect?

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Analyn Tolentino
Analyn TolentinoLv10
26 Jan 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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<p>Consider two antennas radiating 7.7 MHz radio waves inphase with each other. They are located at points S1 and S2,separated by a distance d = 175 m, Fig. 24-61. What are thefarthest two points on the positive y axis where there will bedestructive interference? (Destructive interference in this casemeans that a radio receiver placed at that point would pick up nosignal).<br />farthest y ?? m</p>
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1. Why does FM Radio sound better than AM Radio for music?

  Because FM stations don’t transmit as far so the signal is stronger
  Because FM broadcast allows modulation frequencies of 100-15,000 Hz.
  Because only music stations broadcast on FM
  Because FM is a new technology

2. This is a dish antenna with a lot of gain, designed to communicate with deep space satellites. The radio antenna pictured above has motors that point it at satellites.   Why does the antenna need to move to work?

  Putting big motors on things always makes them better
  The magnetic field of the earth interferes with the electromagnetic waves generated. By moving the antenna this can be corrected for.
  It needs to point at the satellites to keep the focused waves on the satellites
  It needs to change its orientation so it will not look directly at the sun.

3. Why do radio stations use 1/4-wave antenna?

  They are really small compared to other antennas.
  They are really easy to make
  They are really common, so why not?
  They radiate in all radial directions equally so they reach people all around

4. ‘The Jack’ radio station in Dallas broadcasts on 100.3 FM. They use a 1/4-wave antenna to broadcast. How long is this antenna?

  15.3 m
  0.254 m
  0.747 m
  1.992 m

5. The sampling rate used for storing music on a CD is ________?

  48,000 samples/sec
  22,050 samples/sec
  44,100 samples/sec
  8,000 samples/sec

Two radio-frequency point sources S1 and S2, separated by distanced = 1.0 m, are radiating in phase with ? = 0.25 m. A detector movesin a large circular path around the two sources in a planecontaining them. How many maxima does it detect?
------------maxima


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