AC Theory T1-2
Authored by Leonie Davies
Instructional Technology
Professional Development
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The AC value of current that has the same heating effect as that value of DC is the:
Average
RMS
instantaneous
max
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The frequency of a wave form is:
cycles per second
cycles per minute
cycles per milli second
cycles per 360 degrees
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
phasors normally
do not represent real values
rotate anti-clockwise
do not have a direction
rotate clockwise
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which trigonometry equation is incorrect
opp/hyp
hyp/adj
adj/hyp
opp/adj
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Total impedance is represented by
Xl (ohms)
Xc (ohms)
Z (ohms)
R (ohms)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a series circuit what is the reference for a phasor diagram
current (I)
voltage (V)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
if a value is said to be in phase what angle would it be drawn on a phasor diagram
leading by 90 degrees
lagging by 90 degrees
0 degrees on the reference line
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