- Communication Systems - Section 1
- Communication Systems - Section 2
- Communication Systems - Section 3
- Communication Systems - Section 4
- Communication Systems - Section 5
- Communication Systems - Section 6
- Communication Systems - Section 7
- Communication Systems - Section 8
- Communication Systems - Section 9
- Communication Systems - Section 10
- Communication Systems - Section 11
- Communication Systems - Section 12
- Communication Systems - Section 13
- Communication Systems - Section 14
- Communication Systems - Section 15
- Communication Systems - Section 16
- Communication Systems - Section 17
- Communication Systems - Section 18
- Communication Systems - Section 19
- Communication Systems - Section 20
- Communication Systems - Section 21
- Communication Systems - Section 22
- Communication Systems - Section 23
- Communication Systems - Section 24
- Communication Systems - Section 25


Communication Systems - Engineering
Q1: A 300 Hz sound wave of intensity 20 dB is transmitted by a 1500 kHz radio wave by frequency modulation. It is seen that instantaneous frequency varies between 1500.2 kHz and 1499.8 kHz, 300 times a second. If the intensity of sound wave is 100 dB.A The instantaneous frequency variations will be between 1500.2 and 1499.8 kHz, 1500 times a second
B
The instantaneous frequency variations will be between 1501 and 1499 kHz, 1500 times a second
C
The instantaneous frequency variations will be between 1501 and 1499 kHz, 300 times a second
D
The instantaneous frequency variations will be between 1501 and 1499 kHz, 60 times a second
ANS:C - The instantaneous frequency variations will be between 1501 and 1499 kHz, 300 times a second Since, the intensity of audio wave has been increased five times, the instantaneous frequency variation is also increased five times. |


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