How to Convertir ohms to amps

How to Convertir resistance in ohms (Ω) to Électrique current in amps (A).

You can Calculer amps from ohms and volts or watts, but you can't Convertir ohms to amps since amp and ohm units represent different quantities.

Ohms to amps calculation with volts

The current I in amps (A) is equal to the voltage V in volts (V), divided by the resistance R in ohms (Ω):

I(A) = V(V) / R(Ω)

So

amp = volt / ohm

or

A = V / Ω

Example

What is the current of an electrical circuit that has voltage supply of 12 volts and resistance of 40 ohms

The current I is equal to 12 volts divided by 40 ohms:

I = 12V / 40Ω = 0.3A

Ohms to amps calculation with watts

The current I in amps (A) is equal to the square root of the power P in watts (W), divided by the resistance R in ohms (Ω):

                   _______________

I(A) = √P(W) / R(Ω)

So

                     _______________

amp = watt / ohm

or

               __________

A = W / Ω

Example

What is the current of an electrical circuit that has power consumption of 30W and resistance of 120Ω

The current I is equal to the square root of 30 watts divided by 120 ohms:

             ________________

I = 30W / 120Ω = 0.5A

 

Amps to ohms calculation

 


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