lab 6

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Temple University *

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1062

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Electrical Engineering

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Feb 20, 2024

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docx

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Melissa Haddadi Lab6: Magnetic Field Due to Currents. Introduction: The purpose of this lab was to help understand how the magnetic field strength and orientation are affected near a current carrying. We used a compass to determine the nature of a physical property of the magnetic field around a current-carrying wire. Then, we had to characterize the magnetic field of the solenoid with or without an iron core along with making statements of confirming, refuting, or inconclusive then base it on the evidence. This lab also helped us understand the limitations of power in circuit components. Procedure: Part 1 : In part one we had to use a compass to determine the nature of at least one physical property of the magnetic field around a current carrying wire. We setup a simple current loop running from the DC power supply through a 10 Ohm resistor and added a 1.5amp glass fuse in between the power supply and the multimeter to prevent burnouts . We then set up a multimeter to watch the current loop. We were observing the behavior of the compass as the magnetic field changed then using the data, we created a graph. Part 2 : we had to characterize the magnetic field of a solenoid with and without the iron core. We used a 3200-turn solenoid with only 0,1 A running a current, we connected titin series with the resistor. We used the capstone to record and collect our data and then created an excel graph to show the change in magnetic field. Part 3: we applied a current to our solenoid placed on its horizontal axis, and placed cardboard over it. We then sprinkled iron fillings on top and recorded observation after we gently tapped it. We repeated the same procedure but this time we used a cylindrical permanent magnet near the hollow core and applied a current.

Data: Part 1 I (A) (x) Angular Displacement (y) 0 324 0.1 328 0.2 331 0.3 333 0.4 334 0.5 336 0.6 338 Sources of Error:

For part one of the procedure the resistor must be at 10 ohm only, the power must be below 3 W. Part 2 the current must be rated to 1.0 A to be sure current is limited Any source of error would be from faulty wires, or fuses there was not a set procedure in this lab which made the lab rely on our knowledge alone. Knowing that our knowledge is not as good as the people that normally make the labs, we could have had mess up the steps needed to produce the best results. Also, none of the compasses in the classroom worked properly. We knew which way north was and none of the equipment in the lab pointed in . There are a few sources of error that come along with this lab. First of all, that direction. Our lab was relatively successful I believe, but since we do not know the actual magnetic field levels, we could not check the percent erro Discussion: Overall, we were able to produce our own experiment to accurately understand how the magnetic field strength and orientation are affected by factors when near a current carrying wire. there is a direct correlation between the current of a circuit and the magnetic field that comes along with this. In part one of the experiment, we were able to see the relationship between current and the degree of a compass. The degree of the angle increased when the current was increased. as we run current though a circuit, the compass will point to the electric field generated. The more current we have the larger the field. In part two, we were able to show the relationship between distance from a solenoid and the magnetic field strength. As the distance from the solenoid with and without an iron core increased the magnetic field strength decreased. It does not matter how many coils you have in a solenoid the only thing that matters is the iron bar. In part three, we were also able to see the shape of the magnetic field which was an outward pater, and when the current was applied the filing would stand u and when it was off it would fall

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flat. The iron shavings were sitting in a pile before we turned on the battery. Once the battery was turned on and the circuit was given a current, the iron shavings changed drastically .