1.

Communication wavelength of the carrier wave is 6000 nm and 2% of the carrier frequency is used in transmission. If each channel occupies a band width of 1 kHz, then maximum how many channels can be transmitted:(1) 106(2) 107(3) 109(4) 108

Answer»

Correct option is (3) 109

f - C/λ - \(\frac{3\times10^8}{6000\times10^{-9}}\) = 5 x 1013 Hz

Total band width used for transmission

 = 2% of 5 x 1013 = 1012 Hz

Number of channels

 = \(\frac{10^{12}}{1\times10^3}\) = 109 channels



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