37.
remember that the wires cannot support compression, so t must be
u juullule call support.
nonnegative.
the equations describing the circuit shown in figure p37 are
-v. + ryij + raiar= 0
- r4i4 + r2i2 + rsis = 0
- rsis + rziz + v2 = 0
i = izti
iz = iz + is
a. the given values of the resistances and the voltage v, are r = 5,
r2 = 100, r3 = 200, r4 = 150, rs = 250 kn, and v; = 100 v.
(note that 1 k 2 = 1000 2.) suppose that each resistance is rated to
carry a current of no more than 1 ma = 0.001 a). determine the
allowable range of positive values for the voltage v2.
b. suppose we want to investigate how the resistance rz limits the
allowable range for v2. obtain a plot of the allowable limit on v2 as a
function of r3 for 150 s r = 250 k..