Electronics and Communication Engineering - Communication Systems
Exercise : Communication Systems - Section 5
- 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
41.
An antenna has a resistance of 50 Ω and an equivalent noise resistance of 30 Ω The noise figure in decibels is
Answer: Option
Explanation:
.
42.
An MTI radar operating at 5 GHz has a PRF of 800 pps. The lowest blind speed is
Answer: Option
Explanation:
Lowest blind speed = 800 x 0.06 = 48 m/s.
43.
For maximum output the width of air gap of audio head should be
Answer: Option
Explanation:
When width of air gap is 0.5 1, output is maximum.
44.
The simplest mixer circuit for public address system uses
Answer: Option
Explanation:
A mixer circuit has variable resistance in series with each microphone to control intensity of sound.
45.
PAM stands for
Answer: Option
Explanation:
PAM or pulse amplitude modulation is a system in which signal is sampled at regular intervals and each sample is made proportional to amplitude of the signal at the instant of sampling.
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