Lab 9 Magnetic Fields Adam Stancil

docx

School

Pikes Peak Community College *

*We aren’t endorsed by this school

Course

1105

Subject

Physics

Date

Dec 6, 2023

Type

docx

Pages

Uploaded by AgentThunder12075

PHY1105C01 Conceptual Physics Magnetic Fields & Induction Adam Stancil 11-8-23

Lab Questions : Part 1 Electric Currents & Magnetic Fields : 1. Example 1 2. Example 2 3. Example 3

Post Lab Questions 1. For the three examples that you explored, describe how the field lines changed from close to the source (wire, coil, etc.) to farther away. Regarding your question (b)’s from above, if all the filings seemed to be affected, would there be a distance that they wouldn’t be? In example 1, the magnetic fields formed into concentric circles. The tightness of the circles represented the field weakening as the distance from the coil grew. In example 2, the circles that would normally form around each coil’s intrusion point (through the plastic plate) began to interact with each other in the space between the two points. This ends up with fields beginning as circles around the point, then forming parabolic fields that flattened out until they met and formed a straight field line at the midpoint between the two points. In example 3, the effect from example 2 is replicated five times. This prevents many of the small circular fields from forming around each coil point and interestingly they merge into an almost wave-shaped field along the coil points. Also, the straight field line in the midpoint between the two points in example 2 becomes the primary shape of most of the field lines in the interior area of the coils. To me, it definitely seemed like each example had a distance where the iron filings weren’t affected by any magnetic field. Any setup similar to these will have a definite distance where there is no affect from the magnetic field produced. As distance increases, the strength of a magnetic field reduces. 2. What produced these magnetic fields? Current flowing through the copper wires creates the magnetic fields. This is the basic principle of electromagnetism. 3. What would happen to the filings if the direction of the current were reversed? If the direction of current were reversed, the filings would also reverse their alignment. In these examples, it is unlikely we would notice much difference with simple human observation. Since the shape of the magnetic fields would be the same, the shape of the resulting filings would appear identical, but each individual filing would be flipped in the same location. Perhaps a small amount of movement could be noticed when the current was reversed as each filing rotated 180 degrees. 4. Research and find an example of a magnetic field on the web. Provide your web source APA citation) and write a short summary about that example. How was it discovered, how is the strength measured, does it have an effect on humans? Etc. In one of the most well-known scientific discovery stories, in 1945 an engineer working on radar systems for Raytheon noticed that a candy bar in his pocket melted after standing near an active radar system. After some testing, he designed the prototype for what would later come to be known as the microwave (Wikipedia). His invention is now in almost every kitchen in modern society, and is part of most people’s daily eating routine.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Part 2 Induction: Post Lab Questions 1. Which coil produced the largest voltage and brightest light in the bulb? Why? The 4-loop coil produced more voltage and a brighter bulb than the 2-loop coil. According to our text Faraday’s Law states ”t he induced voltage in a coil is proportional to the product of its number of loops, the cross-sectional area of each loop, and the rate at which the magnetic field changes within those loops” (Hewitt, 2015, p. 472). Thus, the more loops, the more voltage induced (assuming all other factors are identical). 2. Does dragging slowly or quickly produce the largest voltage and brightest light? Why? Moving the magnet quickly produces more voltage. As mentioned above, Faraday’s Law states the voltage induced depends on the rate at which the magnetic field changes within the loops. Thus, the faster the magnet moves, the faster the field changes, and the more voltage induced. 3. Would switching the polarity of the magnet change your results? Why or why not? No. The orientation of the magnetic poles doesn’t matter to the voltage induced. The first reason it doesn’t is that Faraday’s Law mentions nothing of the polar orientation. The voltage is induced due to a change in the magnetic field of a coil. This change occurs no matter whether the positive or negative pole enters first. The field begins as inert/nothing and then fluctuates as the magnet passes through. 4. Try switching the polarity of the magnet by pressing the button in the lower right. Are the results consistent with your answer to #2? I assume the question meant to say “answer to #3” not “answer to #2”. Assuming this, the answer is yes. No matter which direction (from the left or right) or which orientation (N or S pole entering first), the coils produced the same voltage. Conclusion : These two labs dealt with electromagnetic fields. The first one showed video examples of different coil arrangements and how the magnetic fields they produced affected iron filings near them. It was definitely a helpful visualization to understand how and why magnetic fields formed in the shapes they did. The second lab was a little more simple, but allowed me to experiment with the different aspects of electromagnetic induction. It helped demonstrate how the speed of the magnet’s movement and the number of coils affected the voltage produced. As a virtual lab, there isn’t much I could change were I to reattempt these labs. Overall, it was a painless, easy to comprehend lab. References : Hewitt, P. G. (2015). Mastering Physics -- for Conceptual Physics (12th ed.). Pearson. (n.d.). Microwave oven . Wikipedia. Retrieved November 8, 2023, from https://en.wikipedia.org/wiki/Microwave_oven

Related Documents

PHY 132 - Magnetic Field worksheet.pdf

PHY 132 - e_m of the Electron worksheet.pdf

E-Field Plotting worksheet.pdf

Fall2023 Thin Lenses Lab Online (New Simulator)-1.pdf

Fall2023 Reflection and Refraction Lab Online-1.pdf

L10 Refraction of Light.docx

L6 Projectile Motion.docx

phy112l.lab3resistancewire3.docx

Lab Report 2.pdf

magnetic force lab report.docx

Lab 6 Report.docx.pdf

EXP3-PHYS_182B_196L_Resistivity_screenshots (1).docx (1).pdf

Recommended textbooks for you

Inquiry into Physics

Physics

ISBN:9781337515863

Author:Ostdiek

Publisher:Cengage

Physics for Scientists and Engineers, Technology ...

Physics

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

College Physics

Physics

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:OpenStax College

College Physics

Physics

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Cengage Learning

College Physics

Physics

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Cengage Learning

Physics for Scientists and Engineers

Physics

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Inquiry into Physics
Physics
ISBN:9781337515863
Author:Ostdiek
Publisher:Cengage
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning