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32. (a) We use
P
=
E
2
/R
eq
,where
R
eq
=7
.
00 Ω +
(12
.
0 Ω)(4
.
00 Ω)
R
(12
.
0 Ω)(4
.
0Ω)+(12
.
0Ω)
R
+(4
.
00 Ω)
R
.
Put
P
=60
.
0W and
E
=24
.
0 V and solve for
R
:
R
=19
.
5Ω.
(b) Since
P
∝
R
eq
, we must minimize
R
eq
,wh
ichmeans
R
=0.
(c) Now we must maximize
R
eq
,orset
R
=
∞
.
(d) Since
R
eq
,
max
=7
.
00 Ω + (12
.
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics

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