Radio Shack TRS-80 User Manual page 61

Don't
necessarily
shy
away
from
this
one
if
electricity doesn't
happen
to
be your
bag.
Enough
information
is
given tq write the program, and
the
principle,
the optimizing of
a
value,
is
applicable to
many
fields
of endeavor and
is little
short of profound.
With
the values given
in
the schematic,
design, write
and run a program which
will
try
out
values of load resistance ranging
from
1
to
20 ohms,
in 1
ohm
increments, and
print
the
answers
to
the following:
1.
Value of
Load
Resistance (from
1
to 20
ohms)
2.
Total
circuit
power
(circuit current squared, times source
voltage)
I
2
*
10
3.
Power
lost in
source
(circuit current squared, times source
resistance)
l
1
*
10
4.
Power
delivered to load
(circuit
current squared, times load
resistance)
I
2
*
R
Note: Circuit current
is
found by
dividing source
voltage (120
volts)
by
total circuit
resistance (load resistance + 10
ohms
source
resistance).
Everything
follows
Ohms Law
(V
=
I*R) and Watts
Law
(P
= I*V)
GOOD
LUCK!!!! Don't
look
at
the answer
until you've got
it
whipped.
120
VOLTS
I
MHMMMKHimmHi
59