Physics – Communication Systems – TEST (MCQs Maharashtra HSC Board)

Physics – Communication Systems – TEST (MCQs Maharashtra 12th Board)

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Results

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#1. What is the frequency normally used for television broadcasts?

30 - 300 KHz

30 - 300 KHz

30 - 300 GHz

30 - 300 GHz

30 - 300 Hz

30 - 300 Hz

30 - 300 MHz

30 - 300 MHz

#2. The troposphere reflects waves in the frequency range

0 Hz to 20 KHz

0 Hz to 20 KHz

2 MHz to 30 MHz

2 MHz to 30 MHz

100 MHz to 200 MHz

100 MHz to 200 MHz

20 Hz to 20 KHz

20 Hz to 20 KHz

#3. Very high frequencies normally propagate as

Sky waves

Sky waves

Ground waves

Ground waves

Space waves

Space waves

Surface waves

Surface waves

#4. Line of sight propagation using troposphere is used in the frequency range

> 1600 KHz

> 1600 KHz

< 30 MHz

< 30 MHz

< 1600 KHz

< 1600 KHz

> 30 MHz

> 30 MHz

#5. Space wave propagation is suitable for waves in the frequency range

0 - 20 KHz

0 - 20 KHz

2 MHz – 30 MHz

2 MHz – 30 MHz

0 – 2 MHz

0 – 2 MHz

> 30 MHz

> 30 MHz

#6. VHF radio signals are propagated

Using the stratosphere

Using the stratosphere

Along the ground

Along the ground

Using the ionosphere

Using the ionosphere

Through the troposphere

Through the troposphere

#7. Which of the following is used for UHF scatter?

Ionosphere

Ionosphere

Stratosphere

Stratosphere

Troposphere

Troposphere

Mesosphere

Mesosphere

#8. The ozone layer absorbs

Radio waves

Radio waves

Visible light

Visible light

γ rays

γ rays

X-rays and ultra violet rays

X-rays and ultra violet rays

#9. The part of the atmosphere closest to Earth is called?

Mesosphere

Mesosphere

Ionosphere

Ionosphere

Stratosphere

Stratosphere

Troposphere

Troposphere

#10. Transmission lines radiate at

None of the others

None of the others

Both high and low frequency

Both high and low frequency

Low frequencies

Low frequencies

High frequencies

High frequencies

Finish