EE101 Spice Assignment
A 12 volt automobile battery may be represented as an ideal voltage source in series with
a resistance (sometime referred to as the internal resistance of the battery). Resistance is
in units of ohms, which is denoted by the Greek letter Ω. A load resistor, R, is placed
across the terminals of the battery, as shown below.
Battery
20 Ω
Io
+
12 V
R
Vo
-
Use SPICE (with voltmeters, ammeters, resistors, and .OP simulation) to determine:
a) The current Io through a short circuit (R=0 ohms) across the battery (print out
circuit picture with value in the ammeter)
b) The voltage drop, Vo , across a 20 ohm load (R=20 ohms) and current through the
load, Io (print out circuit picture with values in the ammeter and voltmeter).
c) The voltage drop, Vo , across a 2000 ohm load (R=2000 ohms) and current through
the load, Io (print out circuit picture with values in the ammeter and voltmeter).
You must hand in either a print out of each circuit (directly from B2Spice) used to obtain
the results for each part. Or you can use the "copy circuit picture" feature under the Edit
menu option and paste all 3 circuits onto a single page in MS word and then print out that
page. The meters should show the results on the circuit you hand in.