ohm
Volt per ampere
An ohm is the standard unit of electrical resistance, named after physicist Georg Ohm.
One ohm equals the resistance that allows one ampere of current to flow when one volt is applied.
The symbol is the Greek letter omega (Ω).
Ohms are fundamental to electronics: a 100-ohm resistor, measuring resistance in ohms.
Ohm's law relates voltage, current, and resistance.
Electromotive force unit
- ampereUnit of electrical flow
- wattUnit measuring power
- faradSI capacitance measure
- henryElectrical inductance unit
coulomb · joule · kilohm · megohm · milliohm · mho · SI · metric
Capacity to withstand force
- currentDirected flow of charge
- voltageElectrical potential difference
- circuitClosed electrical pathway
- impedanceAC circuit opposition
amperage · wattage · inductance · capacitance · power · load · alternating · direct
Current-limiting circuit element
- thermistorTemperature-dependent resistor
- varistorVoltage-sensitive resistance element
- semiconductorPartial electrical conductor
- insulatorSubstance resisting energy flow
conductor · copper · silver · nichrome · carbon · ceramic · filament · resistivity
Twenty-fourth Greek letter
- GreekOf Athenian origin
- letterWritten symbol or message
- characterNature, symbol, or role
- notationSystem of written symbols
uppercase · script · typography · scientific · schematic · electronics
Combined electrical measuring device
- ohmmeterInstrument measuring electrical resistance
- ammeterElectrical flow gauge
- voltmeterElectrical potential difference gauge
- calibrationAdjusting for measurement accuracy
precision · accuracy · tolerance · instrumentation · readout · testing · diagnostics · galvanometer
volt
Electromotive force unit
henry · coulomb · joule · kilohm · megohm · milliohm · mho · SI · metric
resistance
Capacity to withstand force
- currentDirected flow of charge
- voltageElectrical potential difference
- circuitClosed electrical pathway
impedance · amperage · wattage · inductance · capacitance · power · load · alternating · direct · grounding
resistor
Current-limiting circuit element
- thermistorTemperature-dependent resistor
- varistorVoltage-sensitive resistance element
- semiconductorPartial electrical conductor
insulator · conductor · copper · silver · nichrome · carbon · ceramic · filament · resistivity · conductivity
omega
Twenty-fourth Greek letter
notation · uppercase · script · typography · scientific · schematic · electronics
multimeter
Combined electrical measuring device
- ohmmeterInstrument measuring electrical resistance
- ammeterElectrical flow gauge
- voltmeterElectrical potential difference gauge
calibration · precision · accuracy · tolerance · instrumentation · readout · testing · diagnostics · galvanometer · bridge
- energyelectricity, power, oil, fuel, gas
- Electrical Unitswatt, ampere, volt, coulomb, farad
- impedanceimpedance, bioimpedance
- electricityelectricity, battery, batteries, wire, wires
- elettricitàfilo, transistor, ampere, watt
- engineeringengineers, civil engineering, engineering, electrical engineering, blueprint