Solving problems with parallel circuits
connected in series is made easier by
drawing simplified circuits.
Remember, when working with resistances
connected in parallel, use parallel-circuit
laws; and when working with resistances
connected in series, use series-circuit laws.
ORIGINAL CIRCUIT
SIMPLIFIED CIRCUIT
Figure A
Figure B
NOTE:
The simplified circuit is a series
circuit; therefore, Rt is found by
adding the values of Ra and Rb (series-
circuit law for total resistance).
a.
The circuit in figure A consists of
___________ parallel circuits connected
in series.
b.
Ra (figure B) represents the combined
value of the parallel network of which
resistances? ______________
c.
Rb (figure B) represents the combined
value of the parallel network of which
resistances? ______________
d.
What is the value of Ra?
____________
e.
What is the value of Rb?
____________
f.
Rt = ____________ ohms
2-17
IT0334
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