What is the formula of ohms law?

Answer 1

Ohm's law describes the relationship between ideal resistance, voltage, and current. Voltage is resistance times current. It is a useful rule of thumb for non-technical people and not an absolute law.

Another Answer

Ohm's Law is probably the most misunderstood so-called 'law' in electrical engineering. What it states, in essence, is that 'the ratio of voltage to current is constant for variations in voltage'. Unfortunately, and this is where the misunderstanding comes in, is that Ohm's Law applies to hardly any load! It doesn't apply to most conductors, and it doesn't apply to most electronic components such as diodes, etc. For Ohm's Law to apply, a graph of current against voltage, for variations in voltage, MUST produce a straight line -and this is hardly ever the case! For example, if we tried to draw this graph for, say, tungsten, we'd end up with a curve -which means Ohm's Law doesn't apply to tungsten!

It's also incorrect to say that Ohm's Law is represented by the equation, R = V/I. This equation is derived from the definition of the ohm, and NOT from Ohm's Law.

To summarise, Ohm's 'Law' is NOT a law at all! To be a 'law', it must be universal (i.e. must apply in every case), and that is not the case with Ohm's 'Law'.

Answer 2

It's a person, Georg Ohm. See the Wikipedia link below.

Answer 3

E=IxR

Where E is voltage, I is current in amps, R is resistance in ohms. It is applicable for pure resistive circuits