Communication System Test

Result

Communication System Test - 14

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Weekly Quiz Competition

Question 1
4 / -1

Which condition is to be satisfied in an AM detector circuit so that the signal corresponds to an en.... of the carrier wave ?

A

B

C

D
Question 2
4 / -1

The transmission of audio signal in radio broadcasting is ____________ type

A
ASK

B
FSK

C
AM

D
FM
Question 3
4 / -1

Transmission loss per km in the optical fibre, used presently is,

A
20 dB

B
2 dB

C
0.2 dB

D
0.02 dB
Question 4
4 / -1

In satellite communication 6 GHz frequency is used for ___________ and 4 GHz frequency is used for

A
Uplink, down link

B
Down link, up link

C
Modulation, demodulation

D
Demodulation, modulation
Question 5
4 / -1

Assertion : Microwave communication is preferred over optical communication.
Reason : Microwaves provide large number of channels and bandwidth an compared to optical signals
(A) Both assertion and reason are true and the reason is correct explanation of assertion
(B) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(C) Assertion is true but reason is false.
(D) Both assertion and reason are false

A
A

B
B

C
C

D
D
Question 6
4 / -1

If a radio receiver amphifier all the signal frequencies equally well, it is said to have high

A
Fidality

B
Distortion

C
Sensibility

D
Sensitivity
Question 7
4 / -1

In frequency modulation

A
The amplitude of modulated wave varies as frequency of carrier wave

B
The frequency of modulated wave varies as amplitude of modulating wave

C
The amplitude of modulated wave varies as amplitude of carrier wave

D
The frequency of modulated wave varies as frequency of modulating wave
Question 8
4 / -1

A silicon optical fibre with a care diameter large enough has a care refractive index of 1.50 and cladding refractive index 1.47. The critical angle at the care cladding interface is ___________

A

B

C

D
Question 9
4 / -1

In satellite communication
(1) The frequency used lies between 5 MHz and 1 MHz
(2) The uplink and downlink frequencies are different
(3) The orbit of geostationary satellite lies in the equatorial plane at an indication of 0^o
In the above statements.

A
Only 2 and 3 are true

B
All are true

C
Only 2 is true

D
Only 1 and 3 are true
Question 10
4 / -1

A signal wave of frequency 12 KHz is modulated with a carrier wave of frequency 2.51 MHz.The upper and lower side band frequency are respectively.

A
2512 Hz and 2508 KHz

B
2522 KHz and 2488 KHz

C
2502 KHz and 2498 KHz

D
2512 KHz and 2498 KHz