Electronics and Communication Engineering - Communication Systems

1.
If sound intensity is 8 W/m2, the dB level of this sound is about
5 dB
50 dB
129 dB
1290 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The distance of a direct broadcasting satellite from earth's surface is about
1000 km
10000 km
36000 km
55000 km
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
Which of the following microphones has an inbuilt amplifier?
Condenser
Moving coil
Ribbon
Carbon
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
UHF range is
3 to 30 MHz
30 to 300 MHz
300 to 3000 MHz
3000 to 30000 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
In asynchronous TDM, for n signal sources, each frame contains m slots, where m is usually
Less than n
2n
n
greater than 2n
Answer: Option
Explanation:
No answer description is available. Let's discuss.