A junction is a point where at least three circuit paths meet.
A branch is a path connecting two junctions .
Kirchhoff's circuit laws
This law states that, for any node (junction) in an electrical circuit ,
the sum of currents flowing into that node is equal to the sum of
currents flowing out of that node.
Kirchhoff's circuit laws are two equalities that deal with the current
and potential difference in the lumped
element model of electrical circuits .
Some terms associated with Kirchhoff's circuit laws
resistor : An electric component that transmits
current in direct proportion to the voltage
across it.
electromotive force: (EMF)—The voltage
generated by a battery or by the magnetic force
according to Faraday’s Law. It is measured in
units of volts (not newtons, N; EMF is not a
force).
capacitor : An electronic component consisting
of two conductor plates separated by empty
space (sometimes a dielectric material is
instead sandwiched between the plates), and
capable of storing a certain amount of charge.