74. (a) Using Eq. 274, we take the derivative of the power
P = i
2
R
with respect to
R
and
set the result equal to zero:
dP
dR
d
dR
R
Rr
rR
=
+
F
H
G
I
K
J
=
−
+
=
εε
2
2
2
3
0
()
which clearly has the solution
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Power

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