ohms
Electrical resistance measures
Ohms are units measuring electrical resistance—how much a material opposes the flow of electric current.
Named after German physicist Georg Ohm, the unit is central to Ohm's law, which relates voltage, current, and resistance.
A wire with high ohms resists current more than one with low ohms.
Symbol: Ω.
Current-limiting circuit element
- potentiometerAdjustable electronic resistance component
- rheostatAdjustable electrical resistance component
- thermistorTemperature-dependent resistor
- varistorVoltage-sensitive resistance element
load · pull-up · pull-down · series · parallel · short · open · breadboard
Unit of electrical flow
- voltElectromotive force unit
- wattUnit measuring power
- coulombUnit of electrical charge
- jouleSI energy quantity
farad · henry · tesla · weber · kilohm · megohm · milliohm · impedance
Combined electrical measuring device
- voltmeterElectrical potential difference gauge
- ammeterElectrical flow gauge
- oscilloscopeVoltage waveform display device
- readoutDisplayed recorded data
calibration · precision · accuracy · tolerance · continuity · testing · probe · leads
One who directs musicians
- insulatorSubstance resisting energy flow
- semiconductorPartial electrical conductor
- copperReddish-brown metallic element
- silverLustrous white precious metal
gold · aluminum · nichrome · carbon · ceramic · resistivity · conductivity · wire gauge
Electrical potential difference
- currentDirected flow of charge
- resistanceCapacity to withstand force
- formulaFixed method or notation
- calculationMathematical problem-solving process
proportional · inverse · relationship · equation · electrical engineering
resistor
Current-limiting circuit element
- potentiometerAdjustable electronic resistance component
- rheostatAdjustable electrical resistance component
- thermistorTemperature-dependent resistor
varistor · load · pull-up · pull-down · series · parallel · short · open · breadboard · soldering
ampere
Unit of electrical flow
joule · farad · henry · tesla · weber · kilohm · megohm · milliohm · impedance · reactance
multimeter
Combined electrical measuring device
- voltmeterElectrical potential difference gauge
- ammeterElectrical flow gauge
- oscilloscopeVoltage waveform display device
readout · calibration · precision · accuracy · tolerance · continuity · testing · probe · leads · digital
conductor
One who directs musicians
- insulatorSubstance resisting energy flow
- semiconductorPartial electrical conductor
- copperReddish-brown metallic element
silver · gold · aluminum · nichrome · carbon · ceramic · resistivity · conductivity · wire gauge · filament
voltage
Electrical potential difference
- currentDirected flow of charge
- resistanceCapacity to withstand force
- formulaFixed method or notation
calculation · proportional · inverse · relationship · equation · electrical engineering
- electricityelectricity, battery, batteries, wire, wires
- electronicscomputer, resistors, capacitors, TVs, TV
- measurementscales, gauging, balance, metering, gram
- Physics quantitiesacceleration, amplitude, area, current, distance
- electrical gridpower grid, power grids, electrical grid, power line, power lines
- Electrical Unitswatt, ampere, volt, coulomb, farad