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Physics CT2 - Coggle Diagram
Physics CT2
transformers
step-up transformer
Increases voltage
decreases current
step down transformer
lowers voltage to 230V
increase current
High voltage=lower current
low current= less heat energy lost to the surroundings
Electricity in a home
Direct current (d.c)
electric current that always flows in one directions
cannot be transferred efficiently over large distances
alternating current (a.c)
is an electric current that is constantly changing direction
can be transferred efficiently over large distances
frequency and voltage of mains electricity
50 hertz: this alternating current flows backwards and forwards 50 times per second
voltage of mains electricity supplied to UK homes is 230V
parallel and series circuit
series
current is constant
voltage is split across the components
parallel
current is constant through
voltage is split through components