Question

A telephonic communication service is working at carrier frequency of $10$ GHz. Only $10\%$ of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of $5$ kHz?

• A. $2\times {10}^5$
• B. $2\times {10}^6$
• C. $2\times {10}^3$
• D. $2\times {10}^4$

Answer 1

Answer: (A)

$2\times {10}^5$

Carrier frequency=$10HGz$

$10\%$ is used in transmission

$\frac{10}{100}\times 10GHz$=$1GHZ$

Each channel requires $5KHz$

Number of channels=$\frac{1GHz}{5KHZ}$

=$2\times {10}^5$