Which type of wave is most commonly used for radio communication?
a) Sound waves
b) Light waves
c) Microwaves
d) Radio waves
What is the primary function of antennas in communication systems?
a) To amplify the signal
b) To modulate the signal
c) To receive and transmit electromagnetic waves
d) To convert sound into electrical signals
In fiber-optic communication, which type of wave is transmitted through the fiber?
a) Sound waves
b) Light waves
c) Radio waves
d) Microwaves
Which communication system uses microwaves for transmission?
a) Satellite communication
b) Telephone communication
c) Fiber-optic communication
d) Radio communication
What is the main advantage of using microwaves in communication?
a) They travel longer distances without attenuation
b) They are easier to detect
c) They carry more information in a given time period
d) They are unaffected by weather conditions
Which of the following is the principle behind the working of a radar system?
a) Reflection of sound waves
b) Transmission and reflection of radio waves
c) Transmission and reception of light waves
d) Transmission of microwaves through fiber optics
In wireless communication, which wave property is commonly modulated for transmitting information?
a) Amplitude
b) Frequency
c) Wavelength
d) Speed
Which wave property is manipulated in Frequency Modulation (FM) radio broadcasting?
a) Amplitude
b) Wavelength
c) Frequency
d) Speed
Which of the following is a typical application of sound waves in communication?
a) Telephone communication
b) Radio broadcasting
c) Sonar systems
d) Satellite communication
In television transmission, what type of wave is used for broadcasting?
a) Radio waves
b) Sound waves
c) Light waves
d) Microwaves
Which communication system uses electromagnetic waves to transmit data at high speeds over long distances?
a) Fiber-optic communication
b) Radio communication
c) Sound wave communication
d) Satellite communication
What type of waves are used in GPS systems for positioning?
a) Microwaves
b) Radio waves
c) Light waves
d) Sound waves
In wireless communication, what is the main function of modulation?
a) To increase the signal strength
b) To reduce the signal interference
c) To encode information onto a carrier wave
d) To convert the signal from digital to analog
What type of waves are used in mobile phone communication?
a) Infrared waves
b) Sound waves
c) Radio waves
d) Light waves
In optical fiber communication, how is information transmitted?
a) By electrical signals
b) By modulating light waves
c) By sound waves
d) By microwave transmission
What type of wave is used in a microwave oven?
a) Radio waves
b) Sound waves
c) Microwaves
d) Infrared waves
Which of the following is a key factor that limits the distance over which radio waves can travel?
a) Frequency
b) Wavelength
c) Amplitude
d) Speed
Which type of wave is used for data transmission in Wi-Fi systems?
a) Radio waves
b) Microwaves
c) Light waves
d) Sound waves
Which of the following is a key use of infrared waves in communication?
a) GPS systems
b) Wireless remote controls
c) Mobile phone communication
d) Optical fiber communication
What is the advantage of using optical fiber cables for communication?
a) High data transmission speed and low signal loss
b) Easy to manufacture
c) Less prone to interference from external signals
d) Cheaper than copper wires
What type of waves are used in radar systems for detecting objects?
a) Light waves
b) Radio waves
c) Microwaves
d) Sound waves
In mobile networks, which wave property is commonly used for transmitting information?
a) Frequency modulation
b) Amplitude modulation
c) Wavelength modulation
d) Phase modulation
Which of the following is an example of communication using sound waves?
a) Mobile phones
b) Radio transmission
c) Sonar systems
d) Satellite communication
What type of wave is used in Bluetooth technology for short-range wireless communication?
a) Radio waves
b) Microwaves
c) Sound waves
d) Light waves
Which type of wave is used in television remote controls for communication?
a) Microwaves
b) Light waves
c) Radio waves
d) Infrared waves
What is the primary method of communication used by satellite systems?
a) Radio waves
b) Light waves
c) Sound waves
d) Microwaves
Which type of wave is commonly used in long-range communication systems such as TV broadcasting?
a) Light waves
b) Radio waves
c) Microwaves
d) Sound waves
In wireless communication, which wave property is typically modulated to carry digital information?
a) Frequency
b) Amplitude
c) Wavelength
d) Speed
Which technology uses light waves to transmit data through the air?
a) Bluetooth
b) Wi-Fi
c) Li-Fi
d) NFC
What is the role of the carrier wave in communication systems?
a) To carry the data
b) To amplify the signal
c) To modulate the signal
d) To encode the data
Which of the following is a common use of radio waves in communication?
a) Optical fiber internet
b) GPS systems
c) AM and FM radio broadcasts
d) Microwave ovens
Which wave property is modulated in Amplitude Modulation (AM) radio broadcasting?
a) Frequency
b) Wavelength
c) Amplitude
d) Phase
