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WorksheetsAC Theory T1-2
Total questions: 12
Worksheet time: 6mins
The AC value of current that has the same heating effect as that value of DC is the:
Average
RMS
instantaneous
max
The frequency of a wave form is:
cycles per second
cycles per minute
cycles per milli second
cycles per 360 degrees
phasors normally
do not represent real values
rotate anti-clockwise
do not have a direction
rotate clockwise
which trigonometry equation is incorrect
opp/hyp
hyp/adj
adj/hyp
opp/adj
Total impedance is represented by
Xl (ohms)
Xc (ohms)
Z (ohms)
R (ohms)
In a series circuit what is the reference for a phasor diagram
current (I)
voltage (V)
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
which component produces a value that is drawn in phase
resistor
capacitor
inductor
which notation indicates a current value on a phasor
open arrow head
closed arrow head
which symbol would not be used in an impedance triangle Pythagoras equation
Xc
Z
C
R
If a voltage value is leading current in a series circuit is it drawn
above the reference line
below the reference line
what does a phasor represent
magnitude and speed
direction and speed
magnitude and direction
magnitude and velocity
