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
a.
3.75×106
b.
4.87×105
c.
3.86×106
d.
6.25×105
Question ID - 50121 | SaraNextGen Top 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
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 |
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)