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QUIZ - AM SECTION
INSTRUCTIONS: Complete the following examination, check your answers carefully.
1. The number of cycles produced per second by a
source of sound is called the ...
A) amplitude.
B) vibration.
C) sound wave.
D) frequency.
2. The radio frequencies used by AM broadcast
stations are between ...
A) 20kHz and 400kHz.
B) 5kHz and 20kHz.
C) 2400kHz and 6000kHz.
D) 550kHz and 1600kHz.
3. The process of removing the audio wave from
the radio wave is called ...
A) demodulation.
B) frequency reduction.
C) modulation.
D) vibrating.
4. When an electromagnetic wave (modulated radio
wave) passes an antenna, it ...
A) induces a voltage and current in the
antenna.
B) changes an audio wave into a radio
wave.
C) changes the carrier frequency.
D) produces sidebands.
5. The power of the signal transmitted by the
broadcast station and the distance, the signal
travelled from the transmitter to the receiver,
determine the ...
A) frequency of the modulation.
B) wavelength of the audio waves.
C) amount of signal picked up by the
antenna.
D) type of filter that is used.
D
10.
B,
9.
A,
8.
D,
7.
A,
6.
6. When the two metal plates on a variable
capacitor are unmeshed the ...
A) capacitance is minimum.
B) capacitance is maximum.
C) capacitance is not affected.
D) inductance is increased.
7. The process of mixing two signals to produce a
third signal is called ...
A) filtering.
B) detecting.
C) rectification.
D) heterodyning.
8. The magic wand is used to determine ...
A) whether more or less inductance is
required in a tuned circuit.
B) whether more or less capacitance is
required in a tuned circuit.
C) the gain of an RF amplifier.
D) whether the oscillator is functioning.
9. The IF frequency of your AM radio is ...
A) 1600kHz.
B) 455kHz.
C) 550kHz.
D) 910kHz.
10. The purpose of the AGC circuit is to ...
A) automatically control the frequency of
the oscillator circuit.
B) control the band width of the IF stages.
C) reduce distortion in the audio circuit.
D) maintain a constant audio level at the
detector, regardless of the strength of
the incoming signal.
C,
5.
A,
4.
A,
3.
D,
2.
D,
1.
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Answers:
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