
Two-Terminal Components
153
ANSWER
The topology can be simplied, as in the topologies shown in Figure 4.86,
with
||
34
RRR
and
345 34
.
The current
345
i
R
can be found with the rule of the current divider between
the resistors
2
and
:
345
2
i
R
RR
i
=
+
Referring now to the circuit of Figure 4.85, and reapplying the current
divider rule, we can write
3
4
345
4
2
i
R
RR
i
R
RR
R
RR
i
RR g
=
+
=
++
The numerical values are
|| 333
34 34
RRR
;
1333
;
R
3
345
;
R
1
3
EXERCISE 10
Star and triangle topologies can be equivalent. Referring to Figure 4.87a
and b, this is true when the value of the resistance between two points in
a star connection is t ...