## 2008-10-09

### Ohm’s law

Ohm’s law

The greater the potential difference or voltage, the greater the current flow.

In other words, when the potential difference between two points in a circuit increases, the current flowing through it increases. When the potential difference (v) between the points decrease, the current (I) decreases.

In fact, the potential difference across a conductor is directly proportional to the current flowing through it when the tempterature of the conductor is kept constant.

V = IR or some would say V = RI In the graph, the slope is the resistance

Source: http://eleceng.dit.ie/dermot/interactive/ohmslaw_graph.gif

Ohm’s law states that the current that passes through an ohmic conductor is directly proportional to the potential difference across it if the temperature and other physical conditions are constant.

An ohmic conductor is one which obeys Ohm’s law, while a conductor which does not obey Ohm’s law is known as non-ohmic conductor. simple.

#### 2 comments: Anonymous said...

V=I*R
at constant temperature,the potential different across the ends of a conductor is directly proportional to the current throught it. Anonymous said...

useful material.sketch of graph should be added.What r its limitations.