BASIC ELECTRONICS - OD1633 - LESSON 1/TASK 2
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
30
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