Radio-Frequency Electronics (2nd Edition, 2009) –
Solutions Manual – Hagen
Which property best makes radio waves safe for diagnosing illnesses through magnetic
resonance imaging?
Which property best makes radio waves useful for space research? - answers-1. Low energy of
radio waves
2. long wavelengths of radio waves
Research is being done on the use of radio waves in destroying cancer cells. What type of
frequency would be best used in this technology? Justify your answer. - answers-Sample
Response: The destruction of cancer cells requires a lot of energy, so high-frequency radio
waves can be used in this technology because they have high energy.
Explain why radio and television stations use different frequencies to broadcast programs. -
answers-Sample Response: Radio and television stations use different frequencies to broadcast
programs to avoid interference. Interference may degrade the quality of signals.
What kind of modulator is used in this scenario?
( ) modulator - answers-amplitude
Which type of modulation is used in these technologies? - answers-AM programs: ✔ amplitude
modulation
Cell phones: frequency modulation✔
FM programs: frequency modulation✔
Television: amplitude modulation and frequency modulation✔
1
, Which type of modulation is applied to radio-controlled toys?
amplitude
frequency
phase
pulse - answers-pulse
Which statement correctly differentiates between transmitters and receivers?
Transmitters have antennas, and receivers do not have antennas.
Transmitters send radio waves, and receivers capture radio waves.
Transmitters have demodulators, and receivers have modulators.
Transmitters do not have amplifiers, and receivers have amplifiers. - answers-Transmitters send
radio waves, and receivers capture radio waves.
Order the steps to describe how information is sent.
A signal is produced.
A signal is seen, heard, or used.
Radio waves are modulated and amplified.
Radio waves are amplified and demodulated. - answers-A signal is produced. ( 1. )
A signal is seen, heard, or used. ( 4. )
Radio waves are modulated and amplified. ( 2. )
Radio waves are amplified and demodulated. ( 3. )
Huan made a chart to study for an exam about radio waves
Which headings best complete the chart?
X: PhaseY: Pulse
2
Solutions Manual – Hagen
Which property best makes radio waves safe for diagnosing illnesses through magnetic
resonance imaging?
Which property best makes radio waves useful for space research? - answers-1. Low energy of
radio waves
2. long wavelengths of radio waves
Research is being done on the use of radio waves in destroying cancer cells. What type of
frequency would be best used in this technology? Justify your answer. - answers-Sample
Response: The destruction of cancer cells requires a lot of energy, so high-frequency radio
waves can be used in this technology because they have high energy.
Explain why radio and television stations use different frequencies to broadcast programs. -
answers-Sample Response: Radio and television stations use different frequencies to broadcast
programs to avoid interference. Interference may degrade the quality of signals.
What kind of modulator is used in this scenario?
( ) modulator - answers-amplitude
Which type of modulation is used in these technologies? - answers-AM programs: ✔ amplitude
modulation
Cell phones: frequency modulation✔
FM programs: frequency modulation✔
Television: amplitude modulation and frequency modulation✔
1
, Which type of modulation is applied to radio-controlled toys?
amplitude
frequency
phase
pulse - answers-pulse
Which statement correctly differentiates between transmitters and receivers?
Transmitters have antennas, and receivers do not have antennas.
Transmitters send radio waves, and receivers capture radio waves.
Transmitters have demodulators, and receivers have modulators.
Transmitters do not have amplifiers, and receivers have amplifiers. - answers-Transmitters send
radio waves, and receivers capture radio waves.
Order the steps to describe how information is sent.
A signal is produced.
A signal is seen, heard, or used.
Radio waves are modulated and amplified.
Radio waves are amplified and demodulated. - answers-A signal is produced. ( 1. )
A signal is seen, heard, or used. ( 4. )
Radio waves are modulated and amplified. ( 2. )
Radio waves are amplified and demodulated. ( 3. )
Huan made a chart to study for an exam about radio waves
Which headings best complete the chart?
X: PhaseY: Pulse
2
