## Like a Star Trek quadrant?

Secondly, yes, a quadrant is a circle cut into four parts.

## What does this have to do with electricity?

Voltage and currents are constantly changing magnitude and direction. When changing direction, they actually rotate in a counterclockwise direction. They are tethered to a point of origin.

Figure 29. Quadrant point of origin

• Quadrant 1 has 0 to 90 degrees.
• Quadrant 2 has 90 to 180 degrees.
• Quadrant 3 has 180 to 270 degrees.
• Quadrant 4 has 270 to 360 degrees.

This is very important as it helps us to determine which vectors belong in which quadrant.

## Polarity

It is also important to understand polarity when dealing with quadrants. A quadrant system is basically an X-Y graph. We use the point of origin as a reference point. On the X axis, anything to the right of the point of origin is positive and anything to the left is negative. On the Y axis, anything above the point of origin is positive and anything underneath it is negative. This means each quadrant has its own polarity, as shown in Figure 30.