Consider a sinusoidal current i=Icos(15[rad/s] -t). Its current phasor makes an angle 135⁰ with the horizontal. Assuming the phasor has not completed a half revolution and was lying on the +x-axis at t=0, what is the time elapsed since the current first reached its maximum value? A. 0.050[S] B. 0.16[s] C. 0.32[s] 135°

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.3MCQ: If a phasor representation of a current is given by I=70.745A, it is equivalent to a. 100e/45 b....
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Consider a sinusoidal current i-Icos(15[rad/s] t). Its current phasor makes an angle 135⁰ with
the horizontal. Assuming the phasor has not completed a half revolution and was lying on the
+x-axis at t=0, what is the time elapsed since the current first reached its maximum value?
A. 0.050[S]
B. 0.16 [s]
C. 0.32[s]
D. 9.0[s]
135°
Transcribed Image Text:Consider a sinusoidal current i-Icos(15[rad/s] t). Its current phasor makes an angle 135⁰ with the horizontal. Assuming the phasor has not completed a half revolution and was lying on the +x-axis at t=0, what is the time elapsed since the current first reached its maximum value? A. 0.050[S] B. 0.16 [s] C. 0.32[s] D. 9.0[s] 135°
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