객관식
The following phasor diagram shows an arbitrary phasor during its first rotation. Assuming that it begins with an angle of 0°, if the phasor took 0.027 s to get to its current position, what is the angular frequency of the phasor?
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Phasors
객관식
A phasor of length 4 begins at 0° . If it is rotating at ω = 250 s−1 , what is the value of the phasor after 0.007 s?
A
0.2
B
0.7
C
3.1
D
3.9
E
4.0
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