circuits Flashcards
what direction do electric currents flow i
to positive end from negative end
what do electrons do
electrons carry energy to components in the circuit
what happens when electron return to positive end
they’re carrying less energy than before
how does current flow in a series circuit
it can only flow in one path in a series circuit
what is electric current and what is it measured in
electric current is flow of electric charge around a circuit and is measured in amperes or amps
what is the rule of current in series circuits
current is same all the way around in series
what do parallel circuits have
parallel circuits have branches
what are currents in parallel circuits like
current splits
current in branches adds to total current leaving the cell
what does a pd of 1 volt tell us
a pd of 1 volt tells us 1j of energy is transferred for every coulomb of charge that is moving through the circuit
how is total pd in series circuit
pd adds up between components in circuits
how is pd in parallel circuits
pd is same across each branch
what is a battery
two or more cells connected together
what is electrical charge measured in and whats the equatio
coloumbs
Q=Ixt
charge = current x time
what is resistance
potential difference required to drive a current through a component
what is resistance equation
r=v/i