lab 9 report.docx

pdf

School

Leeward Community College *

*We aren’t endorsed by this school

Course

MISC

Subject

Physics

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by LieutenantIron3553

Lab 9 Report: Magnetic Induction Magnetic Induction Magnetic induction is the electric field that occurs when a magnetic field changes. In this lab, we observed the induced current caused by the changing magnetic field. Objective The objectives of this lab are to: ● To observe the induced current caused by changing magnetic fields

● to determine the relationship between the induced current in a secondary coil and the distance to the primary coil Materials ● DC power supply ● galvanometer ● strong magnet ● 2 solenoids ● iron core Theory Explain the theory of the lab. The theory of this lab is to observe the induced current caused by changing magnetic fields. In doing this the relationship between the induced current in a secondary coil and the distance to the primary coil is determined. Using Lenz’s Law and Faraday’s Law the direction of the induced current is found as well as the time rate of change of the magnetic flux. Method Type a short paragraph describing what you did in the lab. Emphasize why you did the lab the way you did, not a blow-by-blow procedure. Include at least one diagram or picture of the setup. In this lab, we used a DC power supply, galvanometer, a coil and strong magnets to observe and amplify the effect upon the galvanometer. Moving the magnet at different distances and speeds to observe the reaction and the needle reading on the galvanometer. Second, we observed the magnetic flux of the galvanometer by turning on/off the electromagnet. We placed the primary and secondary coils so there was no distance between the two and used an iron core to create a magnetic coupling. Moving the coils at a farther distance we saw the galvanometer deflection. Data

Graph 1: Galvanometer deflection vs Distance Conclusion Did you fulfill all of the objectives of the lab? Were you successful in proving or disproving your hypotheses? Explain how you have achieved these things. Also in this section, you should include any questions which were asked in the lab. The objectives of this lab were to observe the induced current caused by changing magnetic fields and determine the relationship between the induced current in a secondary build and the distance to the primary coil. We were able to achieve these objectives because our group was able to find this using Lenz’s Law and Faraday’s Law. Using Faraday’s Law we changed the magnetic field by moving a magnetic closer and farther away and turning an electromagnet on/off. In part one, we connected the galvanometer to a coil of wire and moved a strong magnet close and away from the coil to see the reaction. As the magnet moved closer the needle moved away from the magnet. As the magnet moves away, the needle moves towards the magnet. In part two, we placed the secondary coil closer and farther away from the primary coil. As the distance between the coils increased the galvanometer deflection decreased.

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

Questions 1. Speculate on the shape of the graph of the galvanometer vs. distance. What type of function do you think it is (1/r, 1/r 2 , 1/r 3 , ln(r), e -r )? Can you explain why you could have expected this type of graph? (Hint: the field of a solenoid is a dipole field, the same equation as we learned for the electric dipole.) Based on our data that was collected and looking at the graph, the shape of the graph comparing the galvanometer vs distance looks like a decreasing slope. As the distance increases between coils (cm), the galvanometer distance (mV) decreases making its way to zero. With this in mind the shape of the graph could be the function e -r . It could be this type of graph because similar to the graph the function displays a downward slope. This is the result of the number of loops, the more loops the stronger the magnetic field. The further the coil the less current and loops which weakens the flow causing a downward slope. 2. What would you expect would happen in part II if the two coils were placed at 90-degrees? In other words, what would happen if the primary coil pointed at the side of the secondary coil rather than into the front of the coil as we did in part II? If the primary coil is pointed at the side of the secondary coil rather than into the front of the coil as we did in part II, the reaction of the needle reading on the galvanometer will cause a decrease in the galvanometer deflection and distance. 3. Why did you get the opposite deflection when moving the magnet away as compared to moving the magnet towards the coil in part I? Explain your results using Lenz’s Law. According to our data that was collected in this experiment, in part one, we connected the galvanometer to a coil of wire and moved a strong magnet close and away from the coil to see the reaction. As the magnet moved closer to the needle, it moved away from the magnet. As the magnet moves away, the needle moves towards the magnet. In part two, we placed the secondary coil closer and farther away from the primary coil. As the distance between the coils increased, the galvanometer deflection decreased. We got the opposite deflection when moving the magnet because when the magnet is moved, the galvanometer will deflect showing that there is current flowing through the coil. 4. Why did you get a larger deflection when moving the magnet faster? Explain your results using Faraday’s Law. We got a larger deflection when moving the magnet faster because the deflection in the galvanometer and hence the current, causes the magnet to move faster as it’s being pushed towards or pulled away from the coil. Using Faraday’s Law in this lab, the direction of the induced current is found as well as the time rate of change of the magnetic flux.

Related Documents

phys 1112 8.pdf

Physics Exp 5 Lab Report.docx

Document1 - Recovered - Compatibility Mode.docx

crawfordd-lab01.doc

Lab 2_ Momentum.pdf

Lab 4_ Rotation.pdf

Lab 11 report.docx.pdf

Lab Report - PHYS 170.pdf

WorkEnergy_problems-solutions.pdf

Lab 02 Acceleration Due to Gravity.docx

M1 - Theory and Procedure.pdf

M6 - Data Sheets3.pdf

Recommended textbooks for you

Physics for Scientists and Engineers, Technology ...

Physics

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

College Physics

Physics

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Cengage Learning

University Physics Volume 2

Physics

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

College Physics

Physics

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Cengage Learning

Principles of Physics: A Calculus-Based Text

Physics

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Cengage Learning

Glencoe Physics: Principles and Problems, Student...

Physics

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Glencoe/McGraw-Hill

SEE MORE TEXTBOOKS

Recommended textbooks for you

Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics Volume 2
Physics
ISBN:9781938168161
Author:OpenStax
Publisher:OpenStax
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill