This is a problem from my midterm that i'm trying to understand before my final. The question is;(adsbygoogle = window.adsbygoogle || []).push({});

A voltage phasor is given by V = 12∠70° and the frequency is 60 Hz. What is the time-domain voltage at t = 1 ms?

a. 1.47 V

b. 5.11 V

c. -0.335 V

d. -4.73 V

As far as i know, the only equation relevant to this is V(t) = V_{max}*sin(ωt + φ). When i plug in the values, V(t = 0.001) = 12 sin(120π(0.001) + 7π/18), i get V = 12(0.9996), which does not match any of the possible results.

What am i getting wrong?

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# Homework Help: How do I find voltage at time t given a voltage phasor?

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