Q.1
In AM waves what remains constant?
  • Frequency
  • Amplitude
  • Wavelength
  • Crests
Q.2
Which waves pass through the atmosphere and they are not reflected back toward Earth?
  • FM
  • AM
  • Radio
  • Microwa
Q.3
What is orbiting Earth that receive radio, television, and telephone signals and then transmit them around the world?
  • GPS
  • Communication Satellite
  • Transmitter
  • Cell Phone Tower
Q.4
What is faster the speed of light or the speed of sound?
  • The speed of light
  • The speed of sound
Q.5
What are points on a standing wave where the amplitude of the wave is zero?
  • Antinodes
  • Nodes
  • Refraction
  • Reflection
Q.6
What are crests and troughs of a standing wave?
  • Antinodes
  • Nodes
  • Wavelength
  • Resonance
Q.7
What types of waves do cell phones use?
  • Radio waves
  • Gamma Rays
  • Microwaves
  • Ultraviolet Rays
Q.8
How can cell phones make long distance calls?
  • Strong Wifi signal
  • Good reception
  • Satellite telephone systems
  • The government
Q.9
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
Q.10
What waves carry information to your TV and radio ?
  • Radio
  • Microwaves
  • Gamma
  • AM
Q.11
What relays signals it receives from Earth back to other receivers?
  • Tower
  • Cell Phone
  • Transmitter
  • Power Station
Q.12
What must radio waves move around? Select the best answer
  • The curvature of Earth
  • The population of people
  • The population of animals
  • Trees and other plants
Q.13
Which theory was confirmed by the discovery of Heinrich Hertz?
  • Galilean Relativity
  • Maxwell’s Electromagnetic Theory
  • Newtonian Mechanics
  • Special Relativity
Q.14
It is an intense burst of radio-frequency energy lasting for a fraction of a second.
  • Microwave
  • Radio pulse
  • Sound
  • Ultrasound
Q.15
In what part of the transmitter did Hertz see electrical sparks?
  • Battery
  • Conductor
  • Spark-gap
  • Switch
Q.16
Which of the following is the SI unit for frequency?
  • Hertz
  • Ampere
  • Minute
  • Kilometer
Q.17
Which of the following sparks can produce radio waves?
  • High voltage sparks
  • Low voltage sparks
  • Medium voltage sparks
  • Nominal voltage sparks
Q.18
Heinrich Hertz was a famous physicist widely known for his discovery of what?
  • Electromagnetic waves
  • Gravity
  • Magnetism
  • Photons
Q.19
Hertz (Hz) is an SI unit for which of the following measurement?
  • distance
  • frequency
  • mass
  • time
Q.20
True or False: PSAP’s who are close in geographical proximity are usually assigned different frequencies so they can avoid interference
  • True
  • False
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