Studied by 13 people
in what 3 forms can matter exist
Solid (ice cube) Liquid (water) Gas (steam)
An atom which has an excess of electrons
negative ion
what factor does not affect the resistance of a conductor
voltage rating
Approximate resistance of a 'short circuit'
zero ohms Ω
Approximate resistance of an 'open circuit'
maximum / infinity ohms Ω
2 effects which must always occur when electric current passes
heat and magnetism
direction of conventional current flow
positive + to negative -
current
the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit
symbol I
measured in amphere
voltage
pressure from an electrical circuit's power source that pushes charged electrons through a conducting loop, enabling them to do work
symbol V
measured in volts
resistance
a force that counteracts the flow of current
symbol Ω
measured in ohms
cross-sectional area
larger the area results in having the least resistance
types of conductors
copper aluminium brass nichrome carbon mild steel silver tap water sea water
types of insulators
pvc glass porcelain rubber air bakelite transformer oil mica
what electrical source does a battery provide
pressure
what is potential difference
difference in voltage pressure between two bodies
electrons flowing creates...
electrical potential
Note 
Flashcard (80)