Communication System Test

Result

Communication System Test - 11

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

If the frequency of 3 KHz has to be transmitted through amplitude modulation. Which of the following frequency should use as a carrier frequency ?

A
30 Hz

B
300 Hz

C
3000 Hz

D
3 MHz
Question 2
4 / -1

The range of frequencies allotted for commercial FM radio broadcast is

A
88 to 108 MHz

B
88 to 108 KHz

C
8 to 88 MHz

D
88 to 108 GHz
Question 3
4 / -1

The process of superimposing signal frequency on the carrier wave is known as

A
Transmission

B
Reception

C
Modulation

D
Detection
Question 4
4 / -1

A

B

C

D
Question 5
4 / -1

In which frequency range, space waves are normally propagated ?

A
HF

B
VHF

C
UHF

D
SHF
Question 6
4 / -1

If M₁ and M₂ are the refractive indices of the material of core and cladding of an optical fibre, than the loss of light due to its leakage can be minimised by having

A

B

C

D
None of these
Question 7
4 / -1

Through which mode of propagation, the radio waves can be sent from one place to another ?

A
Ground wave propagation

B
Sky wave propagation

C
Space wave propagation

D
All of them
Question 8
4 / -1

A radio can tune to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wave length band ?

A
400m - 250m

B
40m - 25m

C
4m - 2.5m

D
None of these
Question 9
4 / -1

Statement-1 :- sky waves are not used in the transmission of T.V signals
Statement-2 :- T.V signals have a frequency range of 400 to 200 MHz
(a) Statement-1 is true, statement-2 is true.Statement-2 is a correct explanation for statement-1.
(b) Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1.
(c) Statement-1 is true, statement-2 is false
(d) Statement-1 is false, statement-2 is true.

A
a

B
b

C
c

D
d
Question 10
4 / -1

Statement-1 :- Micro waves and not radio waves are used in satellite communication.
Statement-2 :-The wavelength of microwaves is much shorter than that of radio waves. Hence micro wave do not disperse or diffract like radio waves.
(a) Statement-1 is true, statement-2 is true. Statement-2 is a correct explanation for statement-1.
(b) Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1.
(c) Statement-1 is true, statement-2 is false
(d) Statement-1 is false, statement-2 is true.

A
a

B
b

C
c

D
d