Resistance and Ohms
Resistance is opposition to current, is measured in Ohms (), and defined by Ohm's Law as voltage over current, or . The inverse of resistance is conductance.
Resistors are materials that resist the flow of electricity, and therefore have a high resistance (and thus a low conductance) value, hence the term "resistor" for the electrical component which reduce current.
History
The term "ohm" is named after Georg Simon Ohm, who first derived the relationships between current, voltage, and resistance now known as Ohm's Law.
Deeper Knowledge on Resistance and Ohms
Conductance and Siemens
The ability to conduct to current, measured in siemens
Resistors (Electrical Component)
Electrical components that resist the flow of electricity
Ohm's Law
A formula for determining voltage, current, and resistance
Broader Topics Related to Resistance and Ohms
Conductance and Siemens
The ability to conduct to current, measured in siemens
International System of Units (SI)
Formal terms and definitions of the metric system
Current and Amperes
The flow of electricity, measured in amps
Voltage and Volts
Electrical potential energy, measured in volts
Electricity
Energy that results from charged particles