What Is Ohm's Law?

Ohm's Law describes the relationship between voltage, amperage and resistance in a simple electrical circuit.

The law is named after early 19th century German physicist, George S Ohm.

Ohm found that the current in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance in the circuit. Ohm's Law therefore sets out some of the most fundamental rules of how electricity behaves. To properly understand electricity and its characteristics it is important to understand the relationship between volts, amps and ohms.

Studying Ohm's Law reveals that it can be broken down into three straight-forward statements that always hold true. Understanding Ohm's Law enables you to comprehend what any voltage, resistance or amperage indicates about the other two values in a similar fashion to distance, speed and time, which will be familiar to all school children.

The three truths in Ohm's Law are:
* if resistance remains the same, the current flow goes up or down if voltage goes up or down
* when resistance goes up, the current goes down so long as the voltage remains the same
* and when resistance goes down, current goes up if the voltage is still the same.

The ohm's law was named after German scientist Georg Simon Ohm. The law explains mathematical relationship among electric current, resistance and voltage.

V=IR

From wikipedia:

This article is about the law related to electricity. For other uses, see Ohm's acoustic law.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance,^[1] one arrives at the usual mathematical equation that describes this relationship:^[2]

where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.^[3]

Ohm's Law is a statistical relationship between applied voltage and electric current through a material. The underlying physics (Lorentz force, scattering, ...) is fundamental. This is the bulk statistical effect on the quantum dynamics. In effect, it is a statement that the resistance to the flow of electrical current is proportional to the velocity of the electrons.

V= I/R
Voltage (potential) = I (current) divided by R (resistance)

Try this ohms law calculator app through which you can easily came to know about the calculations of voltage,current and resistance.

The potential differences across the ends of a resistor is directly proportional to the current through it,provided its temperature remains the same.