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Ohm's law

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Ohm's law

Postby mike » May 14th, 2014, 3:32 am

The most important basic to understand in electronic:

(Ω) Ohm's law gives the relations between Resistance, Voltage, Current and Power, in pure resistive circuit through two points.

Elements

R : Resistance, Ohm ( Ω - Ohm )
I : Current, Ampere ( A )
V : Voltage, Volt ( V )
P : Power, Watt (W)

Examples:

V=50 Volts
I=2 Amps

Resistor = ?
R = V/I = 50/2 = 25Ω

Power = ?
P = V * I = 50 * 2 = 100W

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Ohm law usage :

Resistance (Ohm) :
R = V / I
R = V² / P
R = P / I²

Current (Amp) :
I = V / R
I = P / V
I = SQR(P / R)

Voltage (Volt) :
V = I * R
V = P / I
V = SQR(P * R)

Power (Watt) :
P = V * I
P = V² / R
P = I² * R

Volts-Amps (VA) (single phase) :
VA = I * V

______________________________

You can also use the Ohm's Law calculation tool here -> Ohm's Law Calculator :)
Mike - DoitFuzz.com Supporter :)
mike
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