RedCrab Math Tutorial

Resistance and Conductance

An electrical load provides resistance to the current in a circuit.
  • The term resistance defines a conductor characteristic of the load in relation to the current

  • The current in a circuit is therefore dependent on the voltage and the resistance of the circuit


Definition of resistance

The resistance of a load is greater, when the current is lower at the given voltage. Or the resistance of a load is greater, when a higher of voltage is required to reach a given current. The symbol of the resistance is R.
The dependency can be defined as: calculation of resistance
The unit of measurement of the resistance is ohms (abbreviation Ω). By definition, the resistance R = 1 Ω when the voltage U = 1 V and the current is 1 A..


The greater the resistance of a load, the lower its ability to conduct electricity. This ability is the conductivity (symbol G). The unit of measurement of the conductivity is the Siemens (abbreviation S)
resistance calculation
calculation of condutivity
Resistor and Conductance
Ohm's Law
Specific Resistivity and Conductance
Resistors in Series
Resistors in Parallel
Wire Voltage Loss
Electrical Power

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