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?

2 x 10⁶

2 x 10⁵

2 x 10⁴

2 x 10⁵

Solution

2 x 10⁵

If n = no. of channels

10% of 10 GHz = n x 5 KHz

or $\frac{10}{1000} x 10 x 10^{9} = n x 5 x 10^{3} \Rightarrow n = 2 x 10^{5}$

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