FIGURE 14.

VOLT-AMPERE CHARACTERISTICS.

When the voltage across a load is held constant, the current depends solely

upon the resistance of the load. For example, figure 15 (on the following

page) shows a graph with the voltage held constant at 12 volts.

The

independent variable is the resistance, which is varied from 2 Ohms to 12

Ohms.

The current is the dependent variable.

Values for current can be

calculated as:

Given:

E = 12 volts

R = 2 Ohms to 12 Ohms

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