Ohm's Law and Formulas Wheel Chart, Ohm's Law after physicist Georg Ohm states that:

For Example:

12 Volts DC 1 Ampere

We don't know Watts and Ohms? 

First ohms formula, 

Ohms?=12/1 

12 Ohms Answer.

Second Watts formula,

Watts? =12v x 1Amp

12 Watts Answer.

12 Watt And 1 Apmere 

We don't know Volt And Ohms.

Third Volt formula,

Volt? =12w / 1 Amp

12 Volts Answer.

See you  Wheel Formulas Chart, 

12 Formulas in Chart, 

In an electrical circuit, the current which passes through a conductor between two points is proportional to the potential difference (i.e. voltage drop or voltage) across the two points, and inversely proportional to the resistance between the two point. In mathematical terms, this is expressed as:
I=V/R 

V=IR where 

(I) is the current in amperes,

(V) is the potential difference (voltage drop or voltage) in volts, and 

(R) is the resistance which is measured in ohms.

The instantaneous electrical power (P) delivered to a component is the product of voltage and current, which may be expressed in mathematical terms as:

P=IV Where (P) is the instantaneous power in watts 

(joules per second Volt-amperes)

The terms I, R and V are as described above,

Ohms Law Formula Wheel use the Ohms law formula wheel below forall the mathematical relationships between P, I, V and R.

Ohms Law Wheel,

Home Ohms Law 

(named after the German physicist Georg Ohm)

Defines the relationship between Voltage, Current and Resistance.

V = I x R Where:*.V is the electrical potential (voltage), measured involts (V),*.I is the current, measured in Amperes 

(Amps/A), and*.R is the resistance, measured in 

Ohms (Ω).Joule's law states that:

P = V x I 

:*.P is Power, measured in Watts.The combination of Ohm's law and Joule's law gives us 12 formulas where 2 of the 4 variables are known.

The wheel Above is a handy tool and memory jogger. To use it, simply choose the quadrant corresponding to the variable you want to calculate.

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