Geometric artboard power output power function image how to make?

function image of power output power of geometric artboard How to make ?

First of all, to understand the power output power and the relationship between the external resistance: set the power of the electromotive force is e, internal resistance is r, outside the resistance of R, the power output power P is: p=i2r=e2r/(r+r) 2

Using geometric sketchpad to explore

1. After starting the geometry artboard. Click on the "line ruler tool" on the left side of the artboard to draw a gleam in the drawing window. (If you need to display the label for the line segment endpoint, you can select "Apply to all new points" in the Auto Display tab of "edit" → "parameter Options" → "text", and click OK.) The drawing recommends no label display. )

2, click on the left side of the "Moving Arrow Tool", select the selection, right-click the Select "Properties" in the "Properties" dialog box in the label to indicate the letter "E", and then check "show Label", as shown in the figure.

3, with the mouse point to take line E, right click to select the "Length" command, then the length of the line segment E, we use the length of E to indicate the size of electromotive force, as shown in the figure.

4, and then use the same method, draw the power supply internal impedance of the size of the line segment.

5, select the "Chart/new Function" command, in the New Function dialog box, enter e2x/(X+R) 2, in the type x represents the size of the outer resistor. When you enter E and R, just click on a segment that represents the size E and R, as shown in the following figure

6, click the "New Function" dialog box "OK" button, when the Geometry Artboard drawing window will appear in the input function, as shown in the following figure. And will directly get the function image, ordinate represents the power supply output power p, the horizontal axis represents the external resistance of the "output power and external resistance relationship of the graph", as shown in the figure.

7, with the mouse point F (x) of the relationship, right click to select Properties, in the Properties dialog box in the label of F should be p, so that the function of f (x) expression more consistent with the physics of the use of P power habit.

8, with the mouse to drag the line segment E and line R side of the small circle point position, thereby changing the length of the segment, that is, change the size of E, R, you can get different electromotive force and internal impedance of the output power and external resistance of the diagram line.

9, click on the left side of the artboard "text Tool" in the drawing window with the title "Power output power and external resistance relationship." Finally, we can beautify the interface by adjusting the position of segment, text and image appropriately.