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A microwave telephone link operating at the central frequency of 10GHz has been established if 2% of this is available for microwave communication channel. Then how many telephone channels can be simultaneously granted if each telephone is allotted a bandwidth of 8 KHz?A. `1.5xx10^(3)`B. `3.5xx10^(2)`C. `2.5xx10^(4)`D. `4.5xx10^(6)` |
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Answer» Correct Answer - C Microwave frequency used in telephone link =10GHz `=10xx10^(9)Hz=10^(10)Hz` Frequency available for microwave communication `=2% "of" 10 GHz=(2)/(100)xx10^(8)Hz` Bandwidth of each telephone channel =8KHz=`8xx10^(3)Hz` Number of microwave telephone channels `=(2xx10^(8))/(8xx10^(3))=2.5xx10^(4)` |
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