Potential

Just like in Junior cert energy, potential is that which draws ...............

Pd and voltage are almost the same thing; they are both measured in volts.

http://www.5min.com/Video/Learn-about-Voltage-99315481

A voltage when applied to a circuit is called an emf.

Sources of emf: mains, simple cells, lead-acid accumulator, car batteries, dry batteries, thermocouple.

Potential difference is like a height difference between the current will only flow if there is such a difference in potential

The unit of potential is the Volt, named after Alessandro Volta wiki,

the 1st cinema in Dublin 1904 founded by James Joyce was called the Volta.

Potential divider.

Demonstration.

Potentiometer as a variable potential divider.

Potentiometer by wally