Communication System Test

Result

Communication System Test - 37

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

In which of the following remote sensing technique is not used

A
Forest density

B
Pollution

C
Wetland mapping

D
Medical treatment
Question 2
4 / -1

For sky wave propagation of a 10 MHz signal, What should be the minimum electron density in ionosphere

A
~1.2 × 10¹² m^–3

B
~10⁶ m^–3

C
~10¹⁴ m^–3

D
~10²² m^–3

Solution
Question 3
4 / -1

What should be the maximum acceptance angle at the aircore interface of an optical fibre ifn₁ and n₂ are the refractive indices of the core and the cladding,respectively

A

B

C

D

Solution
Question 4
4 / -1

IN He–Ne laser the most favorable ratio of helium to neon for satisfactory laser action is

A
1 : 4

B
4 : 1

C
1 : 7

D
7 : 1
Question 5
4 / -1

For good demodulation of AM signal of carrier frequency f, the value of RC should be

A

B

C

D

Solution
Question 6
4 / -1

Of the following which is preferred modulation scheme for digital communication

A
Pulse Code Modulation (PCM)

B
Pulse Amplitude Modulation (PAM)

C
Pulse Position Modulation (PPM)

D
Pulse Width Modulation (PWM)
Question 7
4 / -1

The SKIP ZONE in Radio Wave Transmission is that range where

A
There is no reception of either ground wave or sky wave

B
The reception of ground wave is maximum but that of sky wave is minimum

C
The reception of ground wave is minimum, but that of sky wave is maximum

D
The reception of both ground and sky wave is maximum
Question 8
4 / -1

The area of the region covered by the TV broadcast by a TV tower of 100 m height is (radius of the earth = 6.4 × 10⁶m)

A
12.8π × 10⁸ km²

B
1.28π × 10³ km²

C
0.64π × 10³ km²

D
1.28 × 10³ km²

Solution
Question 9
4 / -1

The velocity of all radio waves in free space is 3 × 10⁸ m/s. The frequency of a radio wave of wavelength 150 m is

A
20 kHz

B
2 kHz

C
2 MHz

D
1 MHz

Solution
Question 10
4 / -1

The sky wave propagation is suitable for radio-waves of frequency

A
Upto 2 MHz

B
From 2 MHz to 20 MHz

C
From 2 MHz to 30 MHz

D
From 2 MHz to 50 MHz