IndiaBIX

Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 25
11.
Human ear can detect sound intensities of the order of
10-4 W/m2
10-8 W/m2
10-13 W/m2
10-18 W/m2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.
2
3
1
-3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Which of the following statements is correct?
Convex lens has positive focal power and concave lens have negative focal power
Convex lens has negative focal power and concave lens have positive focal power
All lens have positive focal power
All lens have negative focal power
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
In Modulation, "carrier" is
resultant wave
speech voltage to be transmitted
voltage with constant frequency, phase or amplitude
voltage for which frequency, phase or amplitude is varied
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
To eliminate ghosts in the picture
use a longer transmission line
connect a booster
change the antenna orientation of location
twist the transmission line
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers