Voltaic pile

Definition

A voltaic pile is the first electrical battery that could continuously provide an electric current to a circuit. It was invented by Alessandro Volta in 1800 and consists of alternating discs of zinc and copper separated by pieces of cardboard soaked in salt water.

5 Must Know Facts For Your Next Test

1. The voltaic pile generates a direct current (DC) due to chemical reactions between the metals and the electrolyte.
2. Each pair of zinc and copper discs along with the electrolyte functions as an individual electrochemical cell.
3. The voltage produced by a single cell in a voltaic pile is relatively small, typically around 1.1 volts, but can be increased by stacking multiple cells in series.
4. It operates on the principle of electromotive force (EMF), where chemical energy is converted into electrical energy.
5. The voltaic pile played a crucial role in the study of electromagnetism and led to further advancements such as the development of the Daniell cell.

Review Questions

• What type of current does a voltaic pile generate?
• How can you increase the voltage output from a voltaic pile?
• What materials are used to construct a typical cell within a voltaic pile?

Related terms

Electromotive Force (EMF): The potential difference generated by an energy source, like a battery or generator, that drives electric current through a circuit.

Direct Current (DC): An electric current flowing in one direction only, typically produced by sources like batteries or solar cells.

Electrochemical Cell: A device capable of generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy.