4. Annex
4.1 Collection of the formularies
Here you find some formularies for basic circuits we have been applying
and exploring in the experiments.
4.1.1 Voltage, current and resistance
The most important values of the electronic technique are voltage, current
and resistance, gathered in the law of Ohm with the following symbols and
values.
The flowing current is increased within a circuit when the given voltage of
an electric circuit is increased. The power of current (I) is proportional to
the given voltage.
The flowing current diminishes when the resistance is raised along with a
constant voltage. This process is used f. ex. in the alimentation of the LEDs
with electricity. The current “I” behaves opposite proportional to the
resistance “R”.
With the following formularies you can work out the three values:
Current = voltage/resistance; or as a formulary:
Example:
Voltage U = 3V
Resistance R = 100 Ohm
Calculated current I = 3V/100 Ohm = 0,03A or 30mA
We can develop the following formularies from here:
Voltage = resistance x current; or as a formulary:
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