AC CIRCUIT FINAL TEST QUESTIONS WITH REVISED ANSWERS
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AC CIRCUIT
Institution
AC CIRCUIT
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 volta...
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
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