Network Analysis

Tutorial on AC Circuits - Part 1

In this tutorial, you will transform a network, calculate a phasor current, and then do the reverse transform to find the time domain current. Consider the circuit below.

The ultimate task is to find i(t). To begin, we want to transform the circuit into the phasor domain. But there's a problem. One of the sources contains a sine, not a cosine. It will therefore be necessary to convert the sine to a cosine.

120sin(200t - 8°) = 120cos(200t - q)

What is q?

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