Quiz on Radio Waves

What are radio waves?

• Sound waves that travel through the air

• Electromagnetic waves with long wavelengths and low frequencies

• Visible light waves used in communication

• Mechanical waves used in satellites

Who discovered radio waves?

• Nikola Tesla

• Guglielmo Marconi

• Heinrich Hertz

• Thomas Edison

What is the primary use of radio waves in communication?

• Transmitting sound through wires

• Broadcasting audio and video wirelessly

• Enhancing internet speed

• Storing data in servers

Which device converts electrical energy into radio waves?

• Antenna

• Transmitter

• Receiver

• Oscillator

Which type of modulation varies the amplitude of radio waves?

• Amplitude Modulation (AM)

• Frequency Modulation (FM)

• Phase Modulation (PM)

• Pulse Modulation

What is a major challenge of using radio waves for communication?

• They cannot travel through vacuum.

• Signal interference.

• High cost of generating radio waves.

• Inability to transmit sound.

Which characteristic describes high-frequency radio waves?

• They travel longer distances.

• They have higher energy and carry more data.

• They are unaffected by interference.

• They are only used in broadcasting radio stations.

What is one benefit of using digital modulation techniques?

• It makes radio waves visible.

• It reduces interference and improves data transmission.

• It eliminates the need for antennas.

• It decreases the range of communication.

Which application uses radio waves for broadcasting music and news?

• Satellite systems

• FM/AM radio

• Bluetooth devices

• Internet routers

What phenomenon occurs when multiple radio signals interfere with each other?

• Modulation

• Signal interference

• Wavelength distortion

• Frequency separation