Transcript Chapter 20 Section 3

Complex Resistor Combinations

Most circuits use both
series and parallel
wiring such as
electrical wiring in a
home.

Example of Typical
Household Circuit 

Outlets are wired in
parallel to allow
appliances to operate
independently

If one appliance is
switched off, the others
stay on

Wiring in parallel ensures
that an identical
potential difference
exists across any
appliance.

To prevent excessive
current, a fuse or
circuit breaker must be
placed in series with all
the outlets.

A circuit breaker
triggers a switch that
interrupts the current
when current reaches a
certain value.

Simplify circuit into groups of series and
parallel resistors.

Find Req for each group using appropriate
rules


Sample Problem 20C
Pg. 747