E8E Peak amplitude (positive and
negative); peak-to-peak values:
measurements; Electromagnetic radiation; wave polarization; signal-to-
noise
(S/N) ratio
E8E01
(D)
What is
the term for the amplitude of the maximum positive excursion of a signal as
viewed on an oscilloscope?
A. Peak-to-peak voltage
B. Inverse peak negative voltage
C. RMS voltage
D. Peak positive voltage
E8E02
(A)
What is
the easiest voltage amplitude dimension to measure by viewing a pure sine wave
signal on an oscilloscope?
A. Peak-to-peak voltage
B. RMS voltage
C. Average voltage
D. DC voltage
E8E03
(B)
What is
the relationship between the peak-to-peak voltage and the peak voltage
amplitude in a symmetrical waveform?
A. 1:1
B. 2:1
C. 3:1
D. 4:1
E8E04
(A)
What input-amplitude
parameter is valuable in evaluating the signal-handling capability of a Class A
amplifier?
A. Peak voltage
B. RMS voltage
C. An average reading power output meter
D. Resting voltage
E8E05
(B)
What is
the PEP output of a transmitter that has a maximum peak of 30 volts to a 50-ohm
load as observed on an oscilloscope?
A. 4.5 watts
B. 9 watts
C. 16 watts
D. 18 watts
E8E06
(D)
If an
RMS reading AC voltmeter reads 65 volts on a sinusoidal waveform, what is the
peak-to-peak voltage?
A. 46 volts
B. 92 volts
C. 130 volts
D. 184 volts
E8E07
(A)
What is
the advantage of using a peak-reading voltmeter to monitor the output of a
single-sideband transmitter?
A. It would be easy to
calculate the PEP output of the transmitter
B. It would be easy to calculate the RMS output
power of the transmitter
C. It would be easy to calculate the SWR on the
transmission line
D. It would be easy to observe the output
amplitude variations
E8E08
(C)
What
are electromagnetic waves?
A. Alternating currents in the core of an
electromagnet
B. A wave consisting of two electric fields at
right angles to each other
C. A wave consisting of an
electric field and a magnetic field at right angles to each other
D. A wave consisting of two magnetic fields at
right angles to each other
E8E09
(C)
Why
don't electromagnetic waves penetrate a good conductor for more than a fraction
of a wavelength?
A. Electromagnetic waves are reflected by the
surface of a good conductor
B. Oxide on the conductor surface acts as a magnetic
shield
C. The electromagnetic waves
are dissipated as eddy currents in the conductor surface
D. The resistance of the conductor surface
dissipates the electromagnetic waves
E8E10
(D)
Which
of the following best describes electromagnetic waves traveling in free space?
A. Electric and magnetic fields become aligned
as they travel
B. The energy propagates through a medium with
a high refractive index
C. The waves are reflected by the ionosphere
and return to their source
D. Changing electric and
magnetic fields propagate the energy across a vacuum
E8E11
(B)
What is
meant by circularly polarized electromagnetic waves?
A. Waves with an electric field bent into a
circular shape
B. Waves with a rotating
electric field
C. Waves that circle the Earth
D. Waves produced by a loop antenna
E8E12
(D)
What is
the polarization of an electromagnetic wave if its magnetic field is parallel
to the surface of the Earth?
A. Circular
B. Horizontal
C. Elliptical
D. Vertical
E8E13
(A)
What is
the polarization of an electromagnetic wave if its magnetic field is
perpendicular to the surface of the Earth?
A. Horizontal
B. Circular
C. Elliptical
D. Vertical
E8E14
(D)
What is
the primary source of noise that can be heard in an HF-band receiver with an antenna
connected?
A. Detector noise
B. Man-made noise
C. Receiver front-end noise
D. Atmospheric noise
E8E15
(A)
What is
the primary source of noise that can be heard in a VHF/UHF- band receiver with
an antenna connected?
A. Receiver front-end noise
B. Man-made noise
C. Atmospheric noise
D. Detector noise