Course (PHY 112) Topics Addressed:

I.                    Electricity

A.     Electric charge

B.     Electric field

C.     Electric current

II.                 Magnetism

A.     Magnetic fields

B.     Electromagnetic induction

C.     Capacitance and inductance

D.     Alternating current

Competencies Addressed:

1.      Explain the application of fundamental physical principles to various physical phenomena.

2.      Apply the Scientific Method to physical phenomena for hypothesis development, experimental design, data acquisition, and data analysis.

3.      Effectively communicate qualitative and quantitative information, orally and in writing.

4.      Apply appropriate problem-solving techniques to practical and meaningful problems, using graphical, mathematical, and written modeling tools.

5.      Work effectively in collaborative groups.

Design Project Summary – Build an 8 W speaker system capable of a relatively flat response from 100 Hz - 5 kHz.

General Project Information - This is a team activity. You will be assigned to a team of 3-4 people. Each member of the team is expected to be able to serve as team spokesperson and to be fully involved with all aspects of the team’s entries. The entries are to reflect the coordinated efforts of all team members.

The team may not spend more than $60 total for their PTFMR project (a budget with receipts is required). All team members must share equally in project costs. Items typically considered to be household junk may be used without cost penalty. Acceptable “junk” includes: wire, clothes hangers, scrap metal and wood, tape, etc. Unacceptable “junk” includes magnets, existing speakers, etc. In other words, voice cones, magnets and the like must be purchased for use, or you must charge fair market value against your budget.

Each team will make a PowerPoint presentation and will submit a written technical report. The presentations will take place the day of the speaker demonstrations and the report will be due the class period immediately following the demonstrations.

Each team member will maintain an individual class notebook. The notebook will be due the class period immediately following the competition/demonstrations.

PTFMR Specifics

• Your speaker system needs to be able to play all frequencies between 100 Hz and 5,000 Hz with an impedance of 8 W and capable of handling 10 W. The sound output will be compared to the signal input at a variety of frequencies and your goal is to have that ratio (output/input) remain constant.
• You may purchase/use magnets and other cannibalized parts from old speakers, but no complete speaker systems or sub-systems.
• Safety should be your #1 concern throughout construction and testing. Be sure to read, understand and follow all warnings and instructions for all tools, equipment and materials you use. Proper eye protection and ventilation are a must. Use of dangerous high-pressure systems and/or hazardous materials should be avoided at all costs. Never handle moving parts while still moving. Always unplug all electrical systems/equipment before working on them.
• The formula used to judge the performance of your speaker system will give the best score for the flattest frequency response.

Project Evaluation Criteria - PTFMR Construction and Operation

Team Name: __________________________________ Date: ________________

Student Name:__________________________________

Student Name:__________________________________

Student Name:__________________________________

Student Name:__________________________________

Judge’s Name:__________________________________

Standard Amplifier Output Voltage V_A = __________ V

Microphone Voltage @ 50 Hz V_P50 = __________ V

Microphone Voltage @ 100 Hz V_P100 = __________ V

Microphone Voltage @ 500 Hz V_P500 = __________ V

Microphone Voltage @ 1 kHz V_P1k = __________ V

Microphone Voltage @ 5 kHz V_P5k = __________ V

Total Flatness F_T = ____________

Raw score N = ____________

Class max raw score N_max = ____________

Final Score F = ____________

Team Written Technical Report - PTFMR

Each team must submit a written report describing the design, construction and operation of their speaker system. The report must be a computer printed document on 8 ½” X 11” white paper, double-spaced with 1” margins all around, 12 point font size and Times New Roman font. Report must be 5-10 pages in length (not including Appendices).

1        Cover Page

a)      Team Name

b)      Team Member Names

c)      Report Date

d)      Abstract (½ page summary)

2        Table of Contents

3        Introduction

4        Design

5        Construction Procedure

6        Speaker System Operation

7        Conclusion/Recommendations

8        Appendices

a)      Speaker System Drawings (front, side and top)

b)      Performance Data (tables and graphs of pertinent data)

c)      Budget (materials list and copies of receipts)

Evaluation Categories Points

Completeness - followed guidelines (0-10 points) _____

Organization – clear and logical (0-10 points) _____

Precision – reader able to replicate speaker system (0-10 points) _____

Mechanics – college level writing (0-10 points) _____

Total _____

PowerPoint Presentation

The presentation should be 8-12 minutes in length and each team member should have a specific role in the presentation. The presentation should include:

1        Technical Details

a)      Drawings

b)      Performance Data

2        Design Challenges/Successes

3        Suggestions for Improvement

4        Physics Highlights/Lowlights

Evaluation Categories Points

Completeness - followed guidelines (0-10 points) _____

Organization – clear and logical (0-10 points) _____

Interest – kept audiences’ attention (0-10 points) _____

Total _____

Individual Class Notebook

Each student must submit a notebook with the following sections:

1. Daily Activity Journal - include a brief entry for every physics related activity (i.e. class, team meeting, individual study)

1. Date
2. Time In/Out
3. Summary
4. Findings
5. Questions

2. Project Summary-

6. Abstract (~250 words)
7. What worked/didn’t
8. Data and analysis

                                                               i.      Table(s)

                                                             ii.      Graph(s)

                                                            iii.      Equations/Calculations

                                                           iv.      Error Analysis

3. Project Self/Peer Evaluation

9. Quality of work
10. Quantity of work
11. Comments

4. Competency Evidence – list of course competencies and evidence of how each was attained
5. Topic Coverage – explain/describe physics topics included in this project

12. English definition
13. Graphical representation(s)
14. Mathematical representation(s)
15. Application to this project
16. Application to other area(s) of your life

6. (Optional) Summary/Synthesis of other teams’ projects

Evaluation Categories Points

Completeness - followed guidelines (0-50 points (10 pts/section)) _____

Mechanics – legible, college level writing (0-20 points) _____

Optional Summary (0-10 points) _____

Optional Synthesis (0-10 points) _____

Total _____

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