Prof. Matt Dobbs
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Physics 257 Asst 7 Answer Key
Physics 257: Assignment 7 – ANSWER KEY
Due in-class before 1:05pm Thursday Nov 8, 2007
Use MATLAB for this assignment. It is available on the physics student computer lab in the Wong building. For plots,
remember to label your axes correctly and use the “graphs” checklist on page 7 of the lab book. For each question,
show
all your steps including the raw commands you issue in MATLAB
. Assignments handed in after 1:05pm but before
the end of the day will lose 25% of the grade.
In an AC series resistor-inductor-capacitor (RLC) electrical circuit, the impedance Z is given by
2
2
1
⎟
⎠
⎞
⎜
⎝
⎛
−
+
=
C
L
R
Z
ω
, where R is the resistance in
Ω
, L is the inductance in H,
C is the capacitance in F, and
ω
is the angular frequency in radians/second. An
experimenter measures the following impedance Z as a function of the angular
frequency
ω
(written in matlab syntax for you to cut and paste):
omega = [ 200, 300, 400, 500, 600, 700, 800, 1000, 1200, 1500, 2000, 2500, 3000, 4000, 6000, 9000] ;
z = [54, 48, 45, 42, 44, 43, 42, 42,