IOLab #4_ Magnetic Fields

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University of Windsor *

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1310

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Electrical Engineering

Date

Apr 3, 2024

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pdf

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Uploaded by MegaPheasant3768

Lab 4: Magnetic Fields Tehreem Janjua Zainab Salley IOLab #5 2/15/2024 Introduction In this lab we will be learning how electric fields work. We will learn that electric fields represent the strength of the Coulomb force felt by a charged test object due to electric charge. We will also learn that magnetic field lines are similar to the electric dipole field lines and the field line must always originate from the north pole and terminate that of the south. We will measure the direction and strength of the magnetic field from a disc or button magnet using the iOLab. Exercise 1: Map the magnetic field around a disc magnet standing on its edge We calibrated our iOLab using the accel-mag- gyro calibration. We launched the software with the magnetometer sensor and we turned off the Bz sensor.We taped a blank piece of white paper to our work surface, in the center of the piece of paper we placed a disc magnet standing on its edge and then measured the magnetic field strength and direction in 12 locations . Figure 1.0: The disk magnet set up

Figure 1.1: Image of iOLab and blank papers with our arrows indicating the direction of the magnetic field in each of the 12 locations Exercise 1 - Data Analysis: Figure 1.2: Magnetometer plot of the side of the magnet (position 3). Smoothing of 5 used Figure 1.3: Magnetometer plot of the side of the magnet (position 6)

Table 1.4: Raw data collected from generated highlighted region of the iOLab’s magnetometer plot reporting the magnetic field strength at each of the 12 locations position (ry) magnetic field (Bx) μT magnetic field (By) µT 1 -13.894 -136.342 2 -21.013 -136.104 3 -0.751 -187.306 4 -9.770 127.410 5 10.161 111.731 6 0.420 115.071 7 210.811 265.031 8 6.670 637.134 9 0.338 628.657 10 -54.554 -325.219 11 -23.489 -349.326 12 0.610 -395.703 Exercise 1 Conclusion From the graph above, we were able to measure the magnetic field strength and direction in 12 locations ,3 on each of the sides. We ignored the z component of the field and rotated the iOLab until one of the two components,Bx or By, reads essentially zero.

Exercise 2; Measure how the magnetic field decreases away from the face of the magnet We taped the magnet to something in such a way that the center of the magnet is at the same height as the magnetometer in the iOLab when the iOLab is on its wheels. We lined up the iOLab magnetometer with the face of the magnet.In that orientation ‘ By’ will measure the magnitude of the magnetic field from the face of the magnet, we then started with the part the iOLab cart right above the ‘M” pushed right up against the magnet and made sure the whole cart is stationary and then we started recording also moving cart slowly and smoothly away from the magnet in a straight line. Figure 2.1: IOLab setup for exercise 2 Exercise 2 - Data Analysis Figure 2.2: Magnetometer and wheel position plot By

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