4.1 Teminotogy 95
in a circuit
For the circuit in Fig 4.3,
a) a[ nodes.
b) all essential nodes.
c) all brarches.
d) all ess€trtial branches.
e) all mesh€s.
two paths that are not loop6 or essential branches.
g) two loops that are trot meshes.
a) The nodes are a, b, c, d, e, f, and g.
b) The essential
nodes are b, c, e, and g.
c) The branches are ?J1,
tb, Rt, R2, R3, R4, R5, R6,
R?, and 1.
d) The essential branches are
R4, R5, R6, R7, and
your understanding of this motelial bt ttting Chopter Prcblettus 4.2 snd 4.3
The number of unktrown currents in a circuit equals the number of
blaltrche$ ,, where the current is not known. For exadple, the circuit
showtr itr Fig. 4.3 has nitre branches in which the cu[ent is uoknown.
Recal that we must have D itrdependent equations to solve a circuit with
b unknown currenls If we bt ,r rcpresent the number of nodes
in the circuit,