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
Correct Answer
E. All of the aboveExplanation
All of the options mentioned in the question use radio waves to transmit information. A garage door opener uses radio waves to communicate between the remote control and the receiver in the garage. Cell phones use radio waves to transmit voice and data signals wirelessly. Cordless phones also use radio waves to transmit signals between the base and the handset. Wireless internet, commonly known as Wi-Fi, uses radio waves to transmit data between devices and a router. Therefore, all of the options mentioned in the question utilize radio waves for transmitting information.Rate this question:
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- 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
Correct Answer
D. 9V battery and a nickleExplanation
To transmit a simple signal to an AM radio, you need a 9V battery and a nickel. The battery provides the power source, while the nickel acts as a makeshift antenna to capture and transmit the signal. The combination of these two components allows for the transmission of the signal to the AM radio.Rate this question:
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- 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.
Correct Answer
B. The spark jumping from the wire to the file.Explanation
The correct answer is "The spark jumping from the wire to the file." This is because when a 9V battery is connected to a wire and a file, a spark can be created when the wire is brought close to the file. This spark is a form of electrical discharge and can generate radio frequency waves that can be picked up by a radio receiver. Therefore, the information being received on the radio is the spark jumping from the wire to the file.Rate this question:
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- 4.
What were transmitters called in the early days of the radio?
- A.
Transmits
- B.
Senders
- C.
Sparkers
- D.
Spark Coils
- E.
Transistors
Correct Answer
D. Spark CoilsExplanation
In the early days of radio, transmitters were called "spark coils." This term refers to the device used to generate high voltage sparks that produced the radio waves necessary for transmission. Spark coils were commonly used before the development of more advanced technology like transistors.Rate this question:
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- 5.
What voltages did the spark coils have?
- A.
20 kV
- B.
20 V
- C.
20,000mV
- D.
20mV
- E.
None of the Above
Correct Answer
A. 20 kVExplanation
The spark coils had a voltage of 20 kV.Rate this question:
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- 6.
A transmitter with high voltage ( 20,000V ) is _______________________ because it __________________ the entire _____________ spectrum.
Correct Answer
illegal spams radioExplanation
A transmitter with high voltage (20,000V) is illegal because it spams the entire radio spectrum.Rate this question:
- 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
Correct Answer
A. There were not many uses for radio waves or people using them.Explanation
High voltage transmitters were legal in the "early days" because there were not many uses for radio waves or people using them. Since radio technology was still in its early stages of development, there were limited applications for radio waves and a small number of individuals utilizing them. As a result, there were no strict regulations or restrictions on high voltage transmitters during this time period.Rate this question:
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- 8.
Rather than using static, all radio transmitters today use continuous _____________ ________________ to transmit information.
Correct Answer
sine waveExplanation
Radio transmitters today use continuous sine waves to transmit information because sine waves have a smooth and regular oscillation pattern. This allows for efficient and reliable transmission of information through the modulation of the sine wave's frequency, amplitude, or phase. Additionally, sine waves have a well-defined frequency and can easily be generated and manipulated using electronic components. This makes them ideal for transmitting information over long distances without distortion or interference.Rate this question:
- 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
Correct Answer
D. All of the aboveExplanation
A transmitter can send audio information using invisible sine waves by modulating the frequency or amplitude of the waves to encode sound signals. Similarly, video information can be transmitted by encoding visual signals into the invisible sine waves. Additionally, data can also be sent using invisible sine waves by encoding binary information into the waveforms. Therefore, all of the mentioned options - audio, video, and data - can be transmitted using invisible sine waves.Rate this question:
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- 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
Correct Answer
B. Each device has a different sine wave frequency.Explanation
Each device having a different sine wave frequency allows them to operate on different channels or frequencies, which helps to prevent interference. This means that even though multiple devices are using radio waves, they are transmitting and receiving signals on different frequencies, ensuring that they do not interfere with each other.Rate this question:
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- 11.
The two parts that any radio has is a _________________ and _________________.
Correct Answer
transmitter receiverExplanation
A radio consists of two essential components: a transmitter and a receiver. The transmitter is responsible for converting audio signals into electromagnetic waves, which are then transmitted through the air. On the other hand, the receiver picks up these electromagnetic waves and converts them back into audio signals, allowing us to listen to the desired radio station. Both the transmitter and receiver are integral parts of a radio system, working together to facilitate the transmission and reception of audio signals.Rate this question:
- 12.
The transmitter takes some sort of message (audio, video, or data), encodes it to a ____________ _________________ and transmits it with ____________ ______________.
Correct Answer
sine wave radio wavesExplanation
The transmitter takes a message, such as audio, video, or data, and encodes it into a sine wave. This encoded message is then transmitted using radio waves.Rate this question:
- 13.
The receiver receives the ____________ ____________ and _____________ the message from the sine wave it receives.
Correct Answer
radio waves decodesExplanation
The receiver picks up the radio waves and decodes the message from the sine wave it receives.Rate this question:
- 14.
Both the transmitter and receiver use _______________ to radiate and capture the radio signal.
Correct Answer
antennasExplanation
Both the transmitter and receiver use antennas to radiate and capture the radio signal. Antennas are devices that convert electrical signals into electromagnetic waves, allowing the transmission of radio signals through the air. They are designed to efficiently radiate and receive these signals, enabling effective communication between the transmitter and receiver. Antennas come in various shapes and sizes, depending on the specific application and frequency range.Rate this question:
- 15.
AM stands for ___________________ ______________________.
Correct Answer
amplitude modulationExplanation
AM stands for amplitude modulation. This is a method used in telecommunications to transmit signals by varying the amplitude of a carrier wave in proportion to the waveform being sent. In AM, the amplitude of the carrier wave is modified to represent the information being transmitted, such as audio or video signals. This modulation technique allows for the efficient transmission of signals over long distances, making it widely used in radio broadcasting.Rate this question:
- 16.
FM stands for ____________________ ____________________.
Correct Answer
frequency modulationExplanation
FM stands for frequency modulation, which is a method of encoding information on a carrier wave by varying the frequency of the wave. In this modulation technique, the frequency of the carrier wave is changed in accordance with the variations in the amplitude of the input signal. This allows for the transmission of audio signals over radio waves, resulting in high-quality sound reproduction. Frequency modulation is widely used in radio broadcasting and communication systems.Rate this question:
- 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
Correct Answer
C. The number of times it oscillates up and down per second.Explanation
The frequency of a sine wave refers to the number of times it oscillates up and down per second. This is a characteristic property of a sine wave and is used to determine its pitch or tone in sound waves or its color in light waves. It is unrelated to how often a message is sent or how often a radio transmitter is turned on. Therefore, the correct answer is "The number of times it oscillates up and down per second."Rate this question:
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- 18.
In AM or Amplitude Modulation, the amplitude of the sine wave or the ________ to _________ voltage, changes.
Correct Answer
peak peakExplanation
In AM or Amplitude Modulation, the amplitude of the sine wave or the peak to peak voltage changes. This means that the highest and lowest points of the wave, or the peak to peak voltage, vary as the signal is modulated. This modulation technique is commonly used in radio broadcasting, where the amplitude of the carrier wave is varied to carry the audio signal.Rate this question:
- 19.
FCC stands for ___________________ ______________________ __________________ in regard to radios.
Correct Answer
Federal Communications CommissionExplanation
The correct answer is "Federal Communications Commission." The FCC is a regulatory agency in the United States that oversees communication systems, including radio. They are responsible for regulating and licensing radio stations, ensuring fair competition, and promoting public safety and welfare in the field of communication.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Dec 03, 2009Quiz Created by
Ryan Smiley