Making Electric Charges Move

What makes an electric charge move? A force

Electric potential difference- the amount of work required to move a charge between 2 points, or the work per unit charge

Unit-volt

Potential difference-can be positive or negative depending upon the direction in which the charge moves.

What makes electric charges move and keep moving?

A device that uses some form of energy to do the work required to move electric charges,such devices include batteries,electric generators,thermocouples and photocells

Battery-

A device that produces electricity by converting chemical energy into electrical energy,made of several smaller units called electric cells or electrochemical cells, each cell consists of two different materials called electrodes as well as an electrolyte (mixture of chemicals that produces a chemical reaction,the chemical reaction releases electric charges, electric cells can be either dry or wet cells). In a wet cell the electrolyte is a liquid. In a dry cell the electrolyte is a paste like mixture.

Thermocouple-

A device that produces electrical energy from heat energy, it releases electric charges as a result of temperature differences

The most direct conversion of energy occurs in a device known as photocell