Electricity Flashcards
ammeter
A device for measuring electric current in a circuit.
Atom
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).
Conductor
A material that allows current to flow through it easily, and has a low resistance.
Insulator
A material that does not allow current to flow easily, and has a high resistance.
Electrical charge
A property of a material, the electric charge can be positive, negative, or neutral.
Electric 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.
Negative charge
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 charge.
Ohms
The units of resistance, symbol Ω.
Parallel
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/ voltage
The amount of energy shifted from the battery to the moving charge, or from the charge to circuit components, in volts (V).
repel
Be pushed away from each other, for example, like magnetic poles repel or like electric charges repel.
resistance
A property of a component, making it difficult for charge to pass through, in ohms (Ω).
series
If components in a circuit are in the same loop in an electric circuit.
Voltmeter
A device for measuring potential difference (voltage).
