Volts

The volt (symbol: V) is the unit of measurement of the electric potential and the difference in electric potential.

Electric Potential Difference 

According to OHM (Ω) law, if R is the resistance of the conductor, V is the potential difference at the extremes of the resistance, and I is the intensity of the current: the following relations apply.

V = R * I (the result is in Volts)

At constant temperature, the potential difference (V) applied to two ends of a metal conductor is directly proportional to the intensity of the current (I) flowing through the conductor.

R = V / I (the result is in Ohm Ω)

I = V / R (the result is in Ampere)

Summary table of OHM (Ω) law

P = POWER (Watt)

P = V * I (W) if I replace V with R * I we will have P = R * I² if I replace I in the formula with V / R we will have P = V² / R

V = VOLTAGE (Volt)

V = R * I (Volt) if I replace I with P / V we would have V² = R * P = 

If I replace R with V / I in the formula, we will have that V = V / I * I = P / I since P = V * I

R = Resistance (OHM = Ω)

R = V / I if I replace V with P / I we will have R = P / I² if instead I replace I with P / V we will have R = V / P / V and finally       R = V² / P

I = Current (Ampere)

I = V / R if I replace R with V / I we will have V / V / I and since V * I = P we will have I = P / V; if I replace the V with R * I in the formula I = P / V we will have that: I² = P / R so: