8.24

 

The linear potentiometer circuit is diagrammed below:

Solving for Vo we get:

Substituting results in the following table:

xR2

x/L=R2

Vo

0

100W

200W

300W

400W

500W

600W

700W

800W

900W

1000W

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0

8.841V

17.442V

25.912V

34.351V

42.857V

51.527V

60.461V

69.767V

79.568V

90.000V

The plot shows the output to be quite non-linear due to loading.