SCOP ROC(CM) Basic Radio 1.1 Basic Radio Theory

SCOP ROC(M) Basic Radio 1.1

Basic Radio Theory

Multiple Select

What two types of modulation are used for Radio Waves

• Amplitude Modulation

• Frequency Modulation

• Time Modulation

• Distance Modulation

Multiple Select

Are radio waves electromagnetic waves

• True

• False

Multiple Choice

What waves carry information to your TV and radio ?

• Radio
• Microwaves
• Gamma
• AM

Multiple Choice

Which waves pass through the atmosphere and they are not reflected back toward Earth?

• FM
• AM
• Radio 
• Microwa

Multiple Choice

____wavelengths are longer than FM wavelengths

• DC

• Hz

• AM

• AC

Multiple Choice

The distance between to crests of a wave is referred as

• Wavelength

• Diameter

• Frequency

• Amplitude

Multiple Choice

VHF Wavelengths can range from

• 1m-10m

• 2km to 5km

• 100m to 1km

• 1cm to 1m

Multiple Choice

VHF Band is from 30Mhz to_________

• 3000thz

• 300Mhz

• 300Khz

• 30Khz

Multiple Choice

Marine VHF Radio operates from

• 156-174Mhz

• 156-174Khz

• 8000-9000Mhz

• 30-40Khz

Multiple Choice

How many Channels are internationally recognized?

• 55

• 82

• 103

• 12

Multiple Choice

Which travels further?

• Ground wave

• Skywave

• Tidal Wave

• Seismic Wave

Multiple Choice

The distance travelled by the VHF radio wave is dependant on antenna _______?

• diameter

• height

• width

• colour

Multiple Choice

VHF Radio is a ________wave

• Ground

• Sky

• Line of Sight

• Back Scatter

Multiple Choice

Which waves pass through the atmosphere and they are not reflected back toward Earth?

• FM
• AM
• Radio 
• Microwa

Multiple Choice

How do FM waves travel?

• As changes in the frequency of the wave

• As changes in the amplitude of the wave

• As changes in the wavelength of the wave

• As changes in the resonance of the wave

Multiple Select

what are radio waves used for on earth?

• wireless transmission of sound messages

• information for communication

Multiple Choice

Radio waves have the longest wavelength and smallest frequencies.

• True

• False

Multiple Choice

How do radio waves work?

• A radio works by converting a specific wavelength into vibrations, generating sound from the speakers.

• They work by going trough and playing sound

• They work by going into the cord and play sound

• Radio waves work by converting vibration to speakers

Multiple Choice

A radio wave is expressed as a ______wave

• Tidal

• Sine

• Frequency

• Longitudinal

Multiple Choice

Marine VHF Radio operates from

• 156-174Mhz

• 156-174Khz

• 8000-9000Mhz

• 30-40Khz

Multiple Select

Are radio waves electromagnetic waves

• True

• False