Ohm’s Law w/ Calculator

      Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere.
  • ( E ) Voltage is the difference in electrical potential between two points in a circuit. It's the push or pressure behind current flow through a circuit, and is measured in ( V ) volts.

  • ( I ) Current is what flows on a wire or conductor. Current is measured in ( A ) amperes or amps.

  • ( P ) Power is the amount of current times the voltage level at a given point measured in wattage or watts.

  • ( R ) Resistance determines how much current will flow through a component. Resistors are used to control voltage and current levels. The higher the resistance, the smaller the amount of current is allowed to flow. Resistance is measured in ohms.

E = I x R
I = E / R
P = E x I
R = E / I


Power (Wattage)   Voltage
 
Voltage Volts
Amperage Amps
Wattage Watts
 
Amperage Amps
Resistance Ohms
Voltage Volts


Amperage   Resistance
 
Voltage Volts
Resistance Ohms
Amperage Amps
 
Voltage Volts
Amperage Amps
Resistance Ohms






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