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Ohms Law Equation and Calculator

Instrumentation and Electrical Design

Equation and Calculator Ohms Law.

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance , one arrives at the usual mathematical equation that describes this relationship:

I = V / R

Ohms Law

where:

I is the current through the conductor in units of amperes
V is the potential difference measured across the conductor in units of volts
R is the resistance of the conductor in units of ohms .

More specifically, Ohm's law states that the R in this relation is constant, independent of the current.

Ohms Law Current
     
  Volts
  Ohms
     
Current = V / R
     
Current =  Amps
     
Ohms Law Voltage
     
  Amps
  Ohms
     
Voltage = I x R
     
Voltage =  Volts
     
Ohms Law Resistance
     
  Volts
  Amps
     
Resistance = V / I
     
Resistance =  Ohms
     
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