The Radio Waves Quiz: How Much You Know?
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How much do you know about the radio waves? Waves are types of electromagnetic radiation, and they have the longest wavelength in the electromagnetic spectrum. A radio wave is created when an electric field and magnetic field join. Do you know how to switch in between signals? This quiz is a perfect way to get some new information on these types of waves and how they behave under different circumstances. Do give it a shot!
- 1.Which of the following uses radio waves to transmit information?
- A.
Garage door opener
- B.
Cell Phone
- C.
Cordless Phone
- D.
Wireless internet
- E.
All of the above
- 2.What do you need to transmit a simple signal to an AM radio?
- A.
AM radio
- B.
Orange and a Wire
- C.
9V battery and an orange
- D.
9V battery and a nickle
- E.
None of the above will transmit a signal to an AM radio
- 3.If you make a slightly more elaborate transmitter with a 9V battery, file, and wire. What is information is being received on the radio?
- A.
Electricity flowing through the wire.
- B.
The spark jumping from the wire to the file.
- C.
Electricity flowing through the rough file.
- D.
The battery charging.
- E.
None of the above.
- 4.What were transmitters called in the early days of the radio?
- A.
Transmits
- B.
Senders
- C.
Sparkers
- D.
Spark Coils
- E.
Transistors
- 5.What voltages did the spark coils have?
- A.
20 kV
- B.
20 V
- C.
20,000mV
- D.
20mV
- E.
None of the Above
- 6.A transmitter with high voltage ( 20,000V ) is _______________________ because it __________________ the entire _____________ spectrum.
- 7.Why were high voltages transmitters legal in "early days"?
- A.
There were not many uses for radio waves or people using them.
- B.
The radios could not receive any other types of messages.
- C.
They were illegal.
- D.
They had better rules back in the day.
- E.
None of the above
- 8.Rather than using static, all radio transmitters today use continuous _____________ ________________ to transmit information.
- 9.What type of information can a transmitter send with invisible sine waves?
- A.
Audio
- B.
Video
- C.
Data
- D.
All of the above
- E.
None of the above
- 10.How can hundreds of different devices that use radio waves not interfere with each other?
- A.
Different devices that use radio waves must be used in different locations.
- B.
Each device has a different sine wave frequency.
- C.
They do interfere with each other.
- D.
Radio waves are not real because you cant see them
- E.
None of the above
- 11.The two parts that any radio has is a _________________ and _________________.
- 12.The transmitter takes some sort of message (audio, video, or data), encodes it to a ____________ _________________ and transmits it with ____________ ______________.
- 13.The receiver receives the ____________ ____________ and _____________ the message from the sine wave it receives.
- 14.Both the transmitter and receiver use _______________ to radiate and capture the radio signal.
- 15.AM stands for ___________________ ______________________.
- 16.FM stands for ____________________ ____________________.
- 17.What is the frequency of a sine wave?
- A.
How often a message is sent.
- B.
How often the radio transmitter is turned on.
- C.
The number of times it oscillates up and down per second.
- D.
The number of times it oscillates right and left per second.
- E.
None of the above
- 18.In AM or Amplitude Modulation, the amplitude of the sine wave or the ________ to _________ voltage, changes.
- 19.FCC stands for ___________________ ______________________ __________________ in regard to radios.
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