Communication System Test

Result

Communication System Test - 2

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Weekly Quiz Competition

Question 1
4 / -1

What fraction of the surface area of the earth can be covered to establish communication by one geostationary satellite?

A
1/2

B
1/3

C
1/4

D
1/8
Question 2
4 / -1

If sky wave with a frequency of 50 MHz is incident on D region at an angle of 30°, then angle of refraction is

A
15°

B
30°

C
60°

D
45°
Question 3
4 / -1

The characteristic impedance of a coaxial cable is of the order of

A
50 Ω

B
200 Ω

C
270 Ω

D
None of these
Question 4
4 / -1

Which one of the following is a full duplex transmission system?

A
TV

B
Radio

C
Telephone

D
Walky-talky (wireless used in the army)
Question 5
4 / -1

The characteristic impedance (Z₀ ) of free space is

A
377 Ω

B
357 Ω

C
100 Ω

D
1000 Ω
Question 6
4 / -1

What is the minimum length of antenna required to transmit a radio signal of frequency 20 MHz ?

A
5.0 m

B
7.5 m

C
2.0 m

D
3.75 m

Solution
Question 7
4 / -1

What happens inside optical fibre?

A
Diffraction

B
Polarisation

C
Interference

D
Total internal reflection
Question 8
4 / -1

An antenna is of height 500 m. What will be its range (Radius of the earth is 6400 km)?

A
800 km

B
100 km

C
50 km

D
80 km
Question 9
4 / -1

Antenna is

A
inductive

B
capacitive

C
resistive above its resonant frequency

D
resistive at resonant frequency
Question 10
4 / -1

How many photons are emitted by a laser source of 5 × 10^-3 W operating at 632.2 nm in 2s ?

A
3.2 × 10¹⁶

B
1.6 × 10¹⁶

C
4 × 10¹⁶

D
None of these

Solution

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Re-Attempt Weekly Quiz Competition

Communication System Test - 2

Result

Communication System Test - 2

Score

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SHARING IS CARING

Question 1

1/2

1/3

1/4

1/8

Question 2

15°

30°

60°

45°

Question 3

50 Ω

200 Ω

270 Ω

None of these

Question 4

TV

Radio

Telephone

Walky-talky (wireless used in the army)

Question 5

377 Ω

357 Ω

100 Ω

1000 Ω

Question 6

5.0 m

7.5 m

2.0 m

3.75 m

Solution

Question 7

Diffraction

Polarisation

Interference

Total internal reflection

Question 8

800 km

100 km

50 km

80 km

Question 9

inductive

capacitive

resistive above its resonant frequency

resistive at resonant frequency

Question 10

3.2 × 1016

1.6 × 1016

4 × 1016

None of these

Solution

User

Question Analysis

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3.2 × 10¹⁶

1.6 × 10¹⁶

4 × 10¹⁶