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Q.1
Are radio waves electromagnetic waves
True
False
Q.2
Which of the following uses radio waves?
Mobile phones
Satellites
Televisions
All of the these
Q.3
Maximum power transfer occurs when the generator impedance Zi is equal to the load impedance Zl
True
False
Q.4
The maximum power of typical transistor RF power amplifiers is in what range?
Milliwatts
Watts
Hundreds of Watts
Kilowatts
Q.5
What are the properties of a radio wave?
frequency
amplitude
protons
Both A & B
Q.6
What are radio waves used for on earth?
wireless transmission of sound messages
information for communication
Both A & B
None of these
Q.7
Can radio waves damage your DNA and even lead to cancer?
False
True
Q.8
Which of the following materials allows the flow of radio waves?
conductor
inductor
insulator
resistor
Q.9
Which of the following is the frequency range of radio waves?
300 kHz – 300 GHz
300 GHz - 3 x 1013 Hz
3 x 1013 Hz - 3 x 1015 Hz
3 GHz - 3 x 1021 Hz
Q.10
In which of the following means is radio waves generated and detected?
A battery and a microscope
A light detector
A microphone and Z104 detector
A spark-gap transmitters and receivers
Q.11
The Radio Act ofset up the ________ to regulate the airwaves and grant licenses to broadcasters who serve a public interest.
Federal Airwaves Commission (FAC)
Federal Radio Commission (FRC)
Radio Airwaves Commission (FAC)
Q.12
Who first produced radio waves through an oscillator inwhich included two coils of wire & transmitting radio waves from one coil to the other?
Heinrich Hertz
Rick Dees
Wilton Meyers
Gregory Vincent
Q.13
The following are known scientists. Who among them first predicted that radio waves existed
Galileo Galilee
Guglielmo Marconi
Isaac Newton
James Clerk Maxwell
Q.14
Based on the electromagnetic spectrum, which of the following do radio waves have?
High frequency and long wavelength
High frequency and short wavelength
Low frequency and long wavelength
Low frequency and short wavelength
Q.15
Janus has to research and give a presentation to his class on among the different types of electromagnetic waves. Which of the following would be impossible for him to work on?
Infrared
Microwave
Radio wave
Ultrasound
Q.16
Radio waves use ultra-high frequency band to deliver which of the following?
Email
Music
Signal
Text Message
Q.17
Who is the first person to prove that radio waves exist?
Heinrich Jazz
Henry Hertz
Albert Einstein
Heinrich Hertz
Q.18
What does GPS tell you?
The time
Your exact location
How much money you have
What the weather is like
Q.19
What is the correct way a cell phone call goes out?
The phone call goes out, transmits through microwaves, then moves to the central hub. Then the signals go to the nearest tower to the receiver of the call
The phone call goes out, transmits through radio waves, then moves to the central hub. Then the signals go to the nearest tower to the receiver of the call
The phone call goes out, transmits through microwaves, then moves to the tower. Then the signals go to the nearest hub to the receiver of the call
The phone call just magically gets to the other phone
Q.20
Which waves can reach great distances (Waves go into atmosphere and reflect back to Earth so that can move around the curvature of Earth)?
FM
AM
Radio
Microwaves
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