Electronics and Communication Engineering - Communication Systems
Exercise : Communication Systems - Section 2
- Communication Systems - Section 13
- Communication Systems - Section 25
- Communication Systems - Section 24
- Communication Systems - Section 23
- Communication Systems - Section 22
- Communication Systems - Section 21
- Communication Systems - Section 20
- Communication Systems - Section 19
- Communication Systems - Section 18
- Communication Systems - Section 17
- Communication Systems - Section 16
- Communication Systems - Section 15
- Communication Systems - Section 14
- Communication Systems - Section 1
- Communication Systems - Section 12
- Communication Systems - Section 11
- Communication Systems - Section 10
- Communication Systems - Section 9
- Communication Systems - Section 8
- Communication Systems - Section 7
- Communication Systems - Section 6
- Communication Systems - Section 5
- Communication Systems - Section 4
- Communication Systems - Section 3
- Communication Systems - Section 2
16.
In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be
Answer: Option
Explanation:
Δf' = 2 x 7.2 
14.4 kHz
New frequency donation will be 14.4 kHz.
17.
Modulation is also called detection.
Answer: Option
Explanation:
Demodulation is called detection.
18.
The maximum range of a transmitter depends on
Answer: Option
Explanation:
Both power and frequency determine the maximum range.
19.
Consider the following statements about Yagi Uda antenna
- It is unidirectional
- Its gain is about 7 dB
- It is used at VLF
- The optimum separation is 0.11
Answer: Option
Explanation:
This antenna is for UHF and VHF bands.
20.
In a two stage cascade amplifier, each stage has a gain of 10 dB and noise figure of 10 dB. The overall noise factor is
Answer: Option
Explanation:
.
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