Electricity Flashcards
Define Current Electricity.
Is the movement of electrons through a wire, due to the attraction between negative and positive particles that pull the electrons to the protons. It is also due to electrons being repelled by other negative particles.
Define Static Electricity.
Is a build of an electrical charge within or on the surface of a material. The charge remains until it is able to be released through an electric current.
Define conductors.
Objects or material that allows an electrical charge to flow freely through it. E.g, Copper.
Define insulators.
Objects or materials that do not allow an electrical charge to flow freely through it. E.g, Aluminium.
Define voltage.
It is the electromagnetic force expressed in vaults.
What is a Voltmeter?
It is an instrument used to measure electric potential in vaults.
What is an Ammeter?
It is an instrument used to measure the amount of current electricity, measured in ‘amperes’.
What is a current?
It is the flow of electrons past a single point in a circuit.
What is resistance?
It is the restriction of the flow of electrons through a wire. All wires have resistance, but long, thin, cool wires have the most resistance.
What are Resistors?
It is a component of an electrical circuit, used to implement electrical resistance.
What are Inductors?
They are electrical components that store energy in a magnetic field.
What are Capacitors?
It is a component of an electrical circuit that stores energy in an electrical field.
What is AC?
(Alternative Current) When electrons constantly switch their direction of travel (forwards THEN backwards)
What is DC?
(Direct Current) When electrons flow in only one direction (forwards OR backwards).
