Electricity static
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14 Terms
conductors are…
materials that permit electrons to flow freely from particle to particle
insulators are
materials that impede the free flow fo electros from atom to atom and molecule to molecule
what is charging
the separation of electric charges
What is earthing / grounding
th removal of excess charge by touching an object to earth
How can an object be charged
Induction — a charged object will induce a charge in a neutral conductor
Friction — transfer of electrons by rubbing
wha is charging
the separation of charges
what is grounding
the removal of excess charge by touching an object to earth
describe teh use of electrostatic charging in our daily lives
definition of EMF
the total energy transferred per unit charge passing through it / the work done by the source in driving a unit charge around a complete circuit
definition of pd
the work done needed to drive a unit charge through the component / the energy transferred as one unit of charge that moves between two points
what is current
the are of flow of charge carriers that is measured in amperes
what is the live neutral and earth wire
live wire is domestic circuit is at high potential
neutral wire is at low potential
potential difference between the live and neutral wire essentially drives a current through the load
what is a short circuit
electric circuit where the resistance is very low
current smuch higher than designed to handle is drawn
what is a fuse
a small piece of resistive wire alloy that melts and breaks with excessive heating or a particular current rating break with excessive current heating or at a particular current rating