RADIO FM AND AM

1. Which of the following is the longest wavelength in the electromagnetic spectrum?

• Microwaves

• Radio waves

• X-rays

• Gamma Rays

2.Which of the following is the Shortest wavelength in the electromagnetic spectrum?

• Microwaves

• Radio waves

• X-rays

• Gamma Rays

3.Different types of waves can be used to transmit information. Which type is the most common in modern communication devices?

• Sound

• Visible light

• Electric current

• Electromagnetic radiation

4.Which properties of radio waves make them useful for sending information?

• Speed

• Amplitude

• Frequency

• Frequency and amplitude

5.Use the figure, which property is being modulated in wave A?

and it is called ---------

• Amplitude (AM modulation)

• Speed (AM modulation)

• Frequency (FM modulation)

• Frequency (AM modulation

6.Use the figure, which property is being modulated in wave B?

and it is called ---------

• Amplitude (AM modulation)

• Speed (AM modulation)

• Frequency (FM modulation)

• Frequency (AM modulation

7.What does changing the

frequency do to the speed of

this radio wave?

• It increases its speed.

• It doesn't affect the speed

• It decreases the speed

• All the answers above

8.In almost every modern means of communication, waves are used to transmit information. Which statement does not describe a characteristic of waves that makes them well-suited for this purpose?

• Waves can move very quickly.

• Waves can hold large amounts of information.

• Waves only carry useful information.

• Waves do not need to permanently move matter.

9.The wider the frequency range that a radio station is given, the more information it can transmit. With their wider frequency ranges, FM radio channels are often used to transmit music, which requires high-quality sound. AM radio channels are often used to transmit talk radio, which has lower-quality sound requirements. How might the sound quality be affected if AM radio waves were used to transmit music?

• The music would have a lower-quality sound.

• The music would have a higher-quality sound.

• The music would sound the same as it would if transmitted using FM radio waves.

• The music done have sound

10.what is the frequency for very high frequency?

• 3000kHz - 30 000MHz

• 30 000MHz - 300 000MHz

• 300 000MHz - 30 000GHz

• 30 000GHz - 300 000GH