The central operating frequency of a microwave telephone link is 8 GHz. 5% of this frequency is available for microwave communication . How many telephone channels can be operated simultaneously if the bandwidth of each telephone channel is 5 KHz ?

Options

A. A. `8xx10^5`
B. B. `8xx10^4`
C. C. `4xx10^6`
D. D. `6xx10^5`

Answer

B

Explanation

Frequency available for microwave communication =5% of 8 GHz = `5/100xx8xx10^9` [ 1G = `10^9` ]
Bandwidth of each telephone channel = 5 KHz = `5xx10^3` Hz
`therefore` No. of telephone channels that can be operated `=(4xx10^8)/(5xx10^3)=0.8xx10^5=8xx10^4`