AC CIRCUIT FINAL TEST QUESTIONS
WITH REVISED ANSWERS
The effective value - Answer-Value of alternating current is the amount that produces
the same degree of heat in a given resistance as an equal amount of direct current. It is
also referred to as RMS value.
Two complete alternations of voltage with no reference to time make up a... - Answer-
Cycle
The unit of frequency is the... - Answer-hertz
The the relationship between the frequency and the period of a sine wave is expressed
as.... - Answer-f=1/t
The peak value of a sine wave is.... - Answer-the absolute value of the point on the
waveform with the greatest amplitude.
Alternating Current - Answer-the most used method to transmit electrical energy from
one location to another.
The two halves of a cycle are referred to as... - Answer-alternations
The formula to determine Erms(effective) value is expressed as... - Answer-Erms =
0.707Ep
Peak-to-peak value - Answer-The vertical distance between the two peaks.
Basic types of nonsinusoidal waveforms includes.... - Answer-Square, Triangular, and
Sawtooth
A sine wave voltage has an effective value of 10 volts, what is the peak volts? - Answer-
14.14 volts
What is the frequency of an AC signal with a period of 0.005 seconds? - Answer-200 Hz
The principal difference between an alternating current (AC) and a direct current(DC)
is? - Answer-AC reverses direction with regularity.
The time required to complete one cycle of a sine wave and is usually measured in
seconds is called? - Answer-Period (t)
Letter used to represent period - Answer-t
, A sine wave voltage of 11 volts peak-to-peak equals how many rms volts? - Answer-
3.89 volts
The frequency of an AC signal is 60 hertz, its period is? - Answer-16.67 ms
One cycle per second is defined as - Answer-hertz
The waveform produced by an AC generator is called? - Answer-a sine wave
Frequency Counter - Answer-Measures frequency by comparing a known frequency
against an input frequency.
The basic AC meter movement is a current-measuring device, but this type of meter
movement can also measure AC voltage and power.
The meter must always be connected in __________ when measuring voltage. -
Answer-Parallel
To measure AC current, the moving coil meter must first... - Answer-convert AC current
to DC current
Moving coil meters is designed to measure - Answer-DC Current
Oscilloscopes are provided with separate display face-plates called _______ that are
mounted in front of the CRT. - Answer-Graticules
The _________ meter movement is referred to as d'Arsonval meter movement. -
Answer-moving coil
The clamp-on meter is based on the principle that: - Answer-an AC current flowing in a
conductor causes a magnetic field to expand and collapse as the current increases and
decreases in value.
The vertical block consist of a vertical input jack, an AC/DC switch, and a ___________
rotary switch. - Answer-volts / cm
Oscilloscope - Answer-The most versatile piece of test equipment available for working
on electronic equipment and circuits. It provides a visual display of what is occuring in
the circuit.
Rectification is the process of... - Answer-converting AC to DC.
An AC meter that does not require the conversion of AC to DC uses the ________
movement. - Answer-Iron-vane
Most Accidents are avoidable? - Answer-True
WITH REVISED ANSWERS
The effective value - Answer-Value of alternating current is the amount that produces
the same degree of heat in a given resistance as an equal amount of direct current. It is
also referred to as RMS value.
Two complete alternations of voltage with no reference to time make up a... - Answer-
Cycle
The unit of frequency is the... - Answer-hertz
The the relationship between the frequency and the period of a sine wave is expressed
as.... - Answer-f=1/t
The peak value of a sine wave is.... - Answer-the absolute value of the point on the
waveform with the greatest amplitude.
Alternating Current - Answer-the most used method to transmit electrical energy from
one location to another.
The two halves of a cycle are referred to as... - Answer-alternations
The formula to determine Erms(effective) value is expressed as... - Answer-Erms =
0.707Ep
Peak-to-peak value - Answer-The vertical distance between the two peaks.
Basic types of nonsinusoidal waveforms includes.... - Answer-Square, Triangular, and
Sawtooth
A sine wave voltage has an effective value of 10 volts, what is the peak volts? - Answer-
14.14 volts
What is the frequency of an AC signal with a period of 0.005 seconds? - Answer-200 Hz
The principal difference between an alternating current (AC) and a direct current(DC)
is? - Answer-AC reverses direction with regularity.
The time required to complete one cycle of a sine wave and is usually measured in
seconds is called? - Answer-Period (t)
Letter used to represent period - Answer-t
, A sine wave voltage of 11 volts peak-to-peak equals how many rms volts? - Answer-
3.89 volts
The frequency of an AC signal is 60 hertz, its period is? - Answer-16.67 ms
One cycle per second is defined as - Answer-hertz
The waveform produced by an AC generator is called? - Answer-a sine wave
Frequency Counter - Answer-Measures frequency by comparing a known frequency
against an input frequency.
The basic AC meter movement is a current-measuring device, but this type of meter
movement can also measure AC voltage and power.
The meter must always be connected in __________ when measuring voltage. -
Answer-Parallel
To measure AC current, the moving coil meter must first... - Answer-convert AC current
to DC current
Moving coil meters is designed to measure - Answer-DC Current
Oscilloscopes are provided with separate display face-plates called _______ that are
mounted in front of the CRT. - Answer-Graticules
The _________ meter movement is referred to as d'Arsonval meter movement. -
Answer-moving coil
The clamp-on meter is based on the principle that: - Answer-an AC current flowing in a
conductor causes a magnetic field to expand and collapse as the current increases and
decreases in value.
The vertical block consist of a vertical input jack, an AC/DC switch, and a ___________
rotary switch. - Answer-volts / cm
Oscilloscope - Answer-The most versatile piece of test equipment available for working
on electronic equipment and circuits. It provides a visual display of what is occuring in
the circuit.
Rectification is the process of... - Answer-converting AC to DC.
An AC meter that does not require the conversion of AC to DC uses the ________
movement. - Answer-Iron-vane
Most Accidents are avoidable? - Answer-True
