BASIC ELECTRONICS - OD1633 - LESSON 1/TASK 2
FIGURE 12.
BASIC FLASHLIGHT SCHEMATIC.
To construct any graph of electrical quantities, it is standard practice to
vary one quantity in a specified way and note the changes which occur in a
second quantity. The quantity which is intentionally varied is called the
independent variable and is plotted on the horizontal axis. The horizontal
axis is known as the X-axis. The second quantity, which varies as a result
or the changes in the first quantity, is called the dependent variable and
is plotted on the vertical or Y-axis.
Any other quantities involved are
held constant.
For example, in the circuit shown in Figure 13 (on the following
page), if