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ohm Definition

ohm (ōm)

noun

the basic unit of electric resistance in the SI and MKS systems, equal to the resistance of a circuit in which an electromotive force of one volt maintains a current of one ampere: symbol, Ω

Etymology: after G. S. Ohm (1789-1854), Ger physicist

ohm Related Forms
ohmic adjective
ohm ( Telecom Definition
) The unit of both resistance (R) and impedance (Z). In the International System of Units (SI), one (1) ohm is the resistance such that a difference in potential of one (1) volt (V) between the positive (+) end and the negative (
ohm Usage Examples

Converse of object

  • take: I don't want someone to go take 10 ohms and die or anything as my funeral suit is in the dry cleaners.
  • have: Now we see why coaxial cable is often designed to have 75 ohms characteristic impedance.
  • unbalance: The dipole has a built-in transformer to match the 72 ohm balanced terminal impedance to 50 ohm unbalanced ( balun ) feeder cable.
  • model: Modeling 50 ohm intrinsic Yagis " width="27 " height="18 " 11.
  • use: Speaker: Use an 8 ohm, 1/2 watt computer speaker.
  • measure: The Capacitor Wizard has measured 25 ohms ESR in circuit.

Adjective modifier

  • purple: Purple ohms, the new magic mushroom alternative product now in stock.
  • few: Below a few ohms the accuracy is not very good.
  • 47k: This is 47 followed by three zeros, that is 47000 or 47K ohms.

Modifies a noun

  • resistor: The voltage on the left hand 10 ohm resistor is flowing out of the top terminal of the resistor.
  • impedance: In common with most good Yagi designs, these antennas are ' matched ' to the standard 50 ohms input impedance of radio-tracking receivers.
  • antenna: You can create close to 50 ohm antennas in models by following the process outlined below.
  • cable: For the digital interconnect a standard coaxial 75 ohm cable is required.
  • resistance: The 4 to 20 mA dc output signal can be connected to a maximum of 1000 ohm resistance load.
  • load: The 4 to 20 mA dc output signal can be connected to a maximum of 1000 ohm resistance load.

Preposition: per

  • volt: Common multimeters range from cheap ones, at 1000 ohms per volt, to pretty good ones at 20,000 ohms per volt.

Noun used with modifier

  • 100k: Controls: Pedal sweeps 100K ohm Hot Potz potentiometer for quick wah ramping Effect On/Bypass toggle switch at bottom of pedal travel.
  • level: Balanced ( XLR ) connectors ( Gold Plated ) ( Low level 10k ohm ).
  • 10k: Balanced ( XLR ) connectors ( Gold Plated ) ( Low level 10k ohm ).
  • k: High Impedance Mic A microphone designed to be fed into an amplifier with input impedance greater than 20 k ohms.

Browse dictionary entries near ohm

  1. Ohioan
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  3. OHG
  4. oh-oh
  5. oh
  6. ogress
  7. ogre
  8. Oglethorpe
  9. ogle
  10. Oglala
  1. Ohm, Georg Simon
  2. Ohm's law
  3. ohmmeter
  4. oho
  5. -oholic
  6. oi
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  10. oil beetle