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In a communication system operating at wavelength 800mm, only one percent of source frequency is available as signal bandwidth.  The number of channels accommodated for transmitting TV signals of band width 6 MHz are (Take velocity of light c=3× 108m/s,h = 6.6 × 10−34  J s)

a.

3.75×106

b.

4.87×105

c.

3.86×106

d.

6.25×105


Question ID - 50121 | SaraNextGen Answer

In a communication system operating at wavelength 800mm, only one percent of source frequency is available as signal bandwidth.  The number of channels accommodated for transmitting TV signals of band width 6 MHz are (Take velocity of light c=3× 108m/s,h = 6.6 × 10−34  J s)

a.

3.75×106

b.

4.87×105

c.

3.86×106

d.

6.25×105

1 Answer - 5876 Votes

3537

Answer Key : (d) -

f=

= 3.75 × 1014  Hz

1 % of  f = 0.0375 × 1014  Hz

=3.75 × 1012  Hz = 3.75 × 106MHz

Number of channels = = 6.25× 105

∴ Correct answer is (d)



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