RedCrab Math Tutorial

Resistor and Conductance
Ohm's Law
Specific Resistivity and Conductance
Resistors in Series
Resistors in Parallel
Wire Voltage Loss
Electrical Power


The Ohm's Law

Ohm's Law defines one of the most important rules for calculating electrical circuits.
In its original form, it determines the resistance in ohms from a current and voltage measurement when U in volts and I in amps are known:
Calculation of current I if U in volts and R in ohms are known:
Calculation of the voltage U, if I in amperes and R in ohms are known:
Calculation of the resistance of a load at 230 volts a current of 4.5 amperes
The example above was created with the RedCrab Calculator. The Ω symbol is optionally automatically placed after the result when the formula symbol R is calculated.

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