Electricity Flashcards
What is potential difference?
The cell or battery provides the push to make charges move. The push is called a potential difference (p.d.)
What is p.d. measured in?
it is measured in volts
A cell or battery has a potential difference it is designed to work at. what is this called?
it is called a rating
what is an ammeter?
A device for measuring electric current in a circuit.
What is amps?
Units of measurement of electric current, symbol A.
what are atoms?
A tiny particle containing protons and neutrons in a nucleus, and electrons
Attract
Be pulled together, for example, opposite poles of a magnet attract and positive and negative charges attract.
Battery
Two or more electrical cells joined together.
Cell
A chemical store of energy, which provides the push that moves charges around a circuit.
charged up
When materials are rubbed together, electrons move from one surface to the other.
Current
Flow of electric charge, usually electrons, in amperes (A).
Electrical conductor
A material that allows current to flow through it easily, and has a low resistance.
Electrical insulator
A material that does not allow current to flow easily, and has a high resistance
Eletric charge
A property of a material, the electric charge can be positive, negative, or neutral.
Eletric field
A region where a charged material or particle experiences a force.
Electron
Tiny particles that are part of atoms and carry a negative charge.
Electrostatic force
Non-contact force between two charged objects.
Lightning
Occurs when electrons jump from one charged area to another and produce a big current.
Negatively charged
An object that has gained electrons as a result of the charging process.
Neutral
Describes an object or particle that has no charge, or in which positive and negative charges cancel out, giving no overall charg
Ohms
The units of resistance, symbol Ω.
Parellel
If some components are in separate loops in an electric circuit.
Positively charged
An object that has lost electrons as a result of the charging process.
Potential difference
The amount of energy shifted from the battery to the moving charge, or from the charge to circuit components, in volts (V).
