What is the name for current that reverses direction periodically? What arc the

Question

What is the name for current that reverses direction periodically? What arc the name and circuit symbol for a source of voltage that reverses direction periodically? What is the expression for voltage at a certain time t that reverses direction in a sinusoidal manner with an maximum voltage V_max and an angular frequency omega? How does the frequency f relate to the angular frequency omega? How does the period of one oscillation T relate to the frequency f? What is the average voltage for a oscillating voltage? What is name for the average of the square of the oscillating voltage? What is the ratio of the average of the square of a oscillating voltage to maximum voltage?

Explanation / Answer

1 alternating current

2 AC voltage ~

3 V= Vmax Sin (wt)

4 w =2pi f

5 T =1/f

6 V avg -0.637 * Vmax

7 RMS voltage

8 0.707

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