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This is Physic Lab. Please follow the directions. I expect at least 90

OPTION B: Worksheet!

(30 points)

Complete

this worksheet

using

(Links to an external site.)

and post answers here.

Inductor Lab (40 points)
Before attempting this lab please complete the material from the Week 13/14 plan.
This lab covers Section 30-6, 31-1 & 31-2
Part I (20 points)
1) Construct the circuit shown using a 5V battery, resistor, capacitor,
inductor and two switches (A & B)
2) For this part we explore what happens when you open & close
Switch B (while Switch A stays open)
a) Make sure both switches are open and hit the Reset button.)
Add a scope for the capacitor.
b) Describe what happens when you close the switch.
c) What kind of circuit is it? (e.g. an RC circuit?)
4
d) What is the theoretical time constant for this circuit?
(di erent time constant than an RC Circuit!)
e) Use the mini graph from the scope to verify the time constant, similar to what you did for the
RC Circuit (HINT: nd time to get to 63% of max Voltage)
3) Now we charge up the capacitor and then discharge it into the inductor using the following
Question 3 Setup:
i) rst make sure to open both switches
ii) click Reset
iii) close Switch B until the capacitor is about 99% charged
iv) opening Switch B
v) then close Switch A and begin the analysis.
a)
b)
c)
d)
e)
f)
Add a second scope, this one on the inductor
Do Question 3 Setup then describe the behavior of the circuit. (use the scope)
What kind of circuit is this?
Calculate the theoretical angular frequency (Ãâ€°) of this circuit
Using the graph nd the period of the circuit, and use it to nd the angular frequency.
Find the % di erence between measured and theoretical angular frequencies
4) For this part we explore what happens when you add a resistor.
a) Add a 50 ohm resistor in series with the inductor.
b) Do the Question 3 Setup & describe the behavior (use the scope)
c) Make a plot of the maximum values (which is when the graph peaks
above the x-axis) VS time using at least 5 maximum values
maximum values
Part II (10 points)
5) Create your own circuit using a battery, resistors, capacitors and inductors.
Make any kind of circuit that you nd interesting. If you are feeling crazy you can even use an AC
voltage source (requires a little understanding of the rest of chapter 31)
a) Use scopes to investigate its behavior
b) Describe any behaviors you observe and try to explain them in terms of what you know about
resistors, capacitors, and inductors.(and AC sources if you use one)
Post your answers to PART I & PART I to the forum by December 1.
Part III (10 points)
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6) After Dec 1, do Peer Review to 3 other posts by students. Give them 50-100 words feedback on
either (a) their Magnetic Creation or the (b) their circuit from Part II. (depends on what they did).
Give them suggestions on how to improve it, and/or some positive feedback.

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