1. Why does FM Radio sound better than AM Radio for music?
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Because FM stations donāt transmit as far so the signal is stronger |
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Because FM broadcast allows modulation frequencies of 100-15,000 Hz. |
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Because only music stations broadcast on FM |
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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.Ā Ā Why does the antenna need to move to work?
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Putting big motors on things always makes them better |
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The magnetic field of the earth interferes with the electromagnetic waves generated. By moving the antenna this can be corrected for. |
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It needs to point at the satellites to keep the focused waves on the satellites |
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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?
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They are really small compared to other antennas. |
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They are really easy to make |
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They are really common, so why not? |
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They radiate in all radial directions equally so they reach people all around |
4. āThe Jackā radio station in Dallas broadcasts on 100.3 FM. They use a 1/4-wave antenna to broadcast. How long is this antenna?
5. The sampling rate used for storing music on a CD is ________?