DC circuits Flashcards
current rules
at any junction in a circuit the total current entering = the total current exiting.
components in series
the current entering a component = the current exiting a component
components in series 2
the rate of flow of charge is the same throughout a series circuit
potential difference rules
for two or more components in series, the total pd is the sum of all the pds.
what is pd
the energy delivered per coulombs of charge
what is energy delivered per coulombs of charge
pd
emf
total pd drop = emf
what is amp current
coulombs per second
what is coulombs per second
amps current
total resistance of series circuits
Rtol=R1+R2+R3…
total resistance of parellel circuits
1/Rtol=1/R1+1/R2+1/R3…..
equation for emf
EMF=I(R+r),EMF = IR + Ir
I = current R = resistance within circuits r = internal resistance
EMF = E/Q
equation for total voltage
V =- EMF - Ir
