phys lab report

4/7/2021 UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experi…

https://mynotebook.labarchives.com/entries/print_page/ODk3MTg5Ljh8NjkwMTQ2LzY5MDE0Ni9Ob3RlYm9vay8zMDk5ODg2MTM4fDIyNzc0ODEuO… 1/5

UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experiment

Assignment # 8B Name Lab 8 Experiment I worked in a group with

Evan Hathaway - Jun 30, 2020, 11:38 AM CDT

Update and Submit

Equipment

Content LA Thirteen - Jun 13, 2020, 1:25 AM CDT

1 AC/DC Electronics Laboratory EM-8656

1 Rotary Motion Sensor PS-2120

1 2-Axis Magnetic Field Sensor PS-2162

1 Short Patch Cords (set of 8) SE-7123

1 Large Rod Base ME-8735

1 90 cm Rod, Stainless Steel ME-8738

1 Mass and Hanger Set ME-8979

1 Black Thread ME-9875

1 850 Universal Interface UI-5000

1 PASCO Capstone UI-5400

Content LA Thirteen - Jun 13, 2020, 1:25 AM CDT

Setup

Content LA Thirteen - Jun 13, 2020, 1:25 AM CDT

4/7/2021 UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experi…

https://mynotebook.labarchives.com/entries/print_page/ODk3MTg5Ljh8NjkwMTQ2LzY5MDE0Ni9Ob3RlYm9vay8zMDk5ODg2MTM4fDIyNzc0ODEuO… 2/5

1. Connect red and black patch cables between the red and black jacks for Output 1 on the Universal Interface and the Electronics Laboratory.

2. Connect wires between the spring clips attached Electronics Laboratory inputs and the clips on either side of the yellow coil.

3. Attach the 90 cm rod to the base and position the base by the Electronics Laboratory as shown in Figure 4.

4. Attach the Rotary Motion Sensor (RMS) to the rod as in Figure 3. Cut a piece of thread about 1 m long. Tie one end of the thread around the strain relief in the cable attached to the Magnetic Field Sensor so it catches in one of the grooves as shown in Figure 4. Pass the other end of the thread over the large step of the RMS pulley and attach a mass holder carrying an additional 60 g of mass.

5. Adjust the positions so the thread between the RMS and the Magnetic Field Sensor is vertical when the sensor is centered on the coil. Attach the sensor handle to the Magnetic Field sensor. Adjust the positions so that while holding the end of the sensor handle against the 90 cm rod, you can move the sensor up and down along the magnetic field axis.

6. Plug the Magnetic Field Sensor and the Rotary Motion Sensor into any two of the PasPort inputs on the 850 Universal Interface.

Figure 4 Figure 5: Circuit Board Connections

Content LA Thirteen - Jun 13, 2020, 1:29 AM CDT

Procedure

Content LA Thirteen - Jun 13, 2020, 1:30 AM CDT

4/7/2021 UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experi…

https://mynotebook.labarchives.com/entries/print_page/ODk3MTg5Ljh8NjkwMTQ2LzY5MDE0Ni9Ob3RlYm9vay8zMDk5ODg2MTM4fDIyNzc0ODEuO… 3/5

1. Open the signal generator at the left of the screen and turn the DC power off 2. Put the Magnetic Field Sensor probe into the coil so the sensor is at the center of the coil and the handle is facing north. The vertical

position of the sensor is indicated by the white dot on the side of the probe away from the labels on the sensor body. 3. Press the Tare button (green button) to zero the sensor. 4. Open Data Summary. 5. Click Rotary Motion Sensor properties, and click “Zero Sensor Now” then OK. 6. Open the Signal Generator. Set Output 1 to a DC Voltage of 5 V. 7. Click Auto, then click the signal generator again to close it. 8. Insert the magnetic sensor probe through the solenoid as far as possible. 9. Click RECORD.

10. Move the probe slowly out of the solenoid keeping it centered with the handle facing north. Continue until the bottom of the sensor is 10 cm above the coil.

11. Click STOP. Record the current in Table 2. 12. If the curve is not symmetric about Position = 0 cm, repeat step 5. Small deviations from the center less than 3 cm are acceptable. 13. Open Data Summary and re-label this run as "Center". Record the Current in Table 2. 14. Select the coordinate tool. Right click the tool and change significant figures to 5. Measure the peak amplitude and record in Table 2. 15. Repeat steps 10-14 with the probe shifted so that the probe is touching the east edge of the coil. Keep the handle pointed north. Label

this run as "East". 16. Repeat steps 10-14 with the probe against the west edge of the coil. Keep the handle pointed north. Label as "West". 17. Reverse the red and black patch cords so the current through the coil is reversed. Repeat step 15 and label it "East Reversed". 18. Calculate the bound values for this solenoid by calculating the field strength for both a short solenoid and a long solenoid using equation

1 and 2. Use the center current measured during the center run. Record these values in Table 3. The calculated value will be in Tesla (T). Convert this value to mT and record in Table 3. For Equation 1, x = 0.

Table 2: Current through Coil

Trial Coil Current (amps) Axial Peak Amplitude (mT)

Center

East

West

East Reversed

Table 3: Bound Values

Model Magnetic Field Strength (mT)

Short Solenoid (equation 1)

Long Solenoid (equation 2)

Content LA Thirteen - Jun 13, 2020, 1:32 AM CDT

Analysis

Content LA Thirteen - Jun 13, 2020, 1:32 AM CDT

4/7/2021 UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experi…

https://mynotebook.labarchives.com/entries/print_page/ODk3MTg5Ljh8NjkwMTQ2LzY5MDE0Ni9Ob3RlYm9vay8zMDk5ODg2MTM4fDIyNzc0ODEuO… 4/5

Axial Field Model:

1. How do the first three runs compare with each other? What does this show about the axial field strength across the coil (moving perpendicular to the axis of the coil)?

2. Does your data indicate that the field is upward or downward? Using the right hand rule, is the current in the coil clockwise or counterclockwise viewed from above?

3. Why is the "East Reversed" run different from the other three?

4. How well did the estimates given by equations 1 & 2 work out? Is the measured value of the solenoid closer to a long solenoid, or a short solenoid? Use the Peak Amplitude found in Table 3 to answer this question.

5. Sketch the axial field data.

Radial Field Model:

Content LA Thirteen - Jun 13, 2020, 1:39 AM CDT

4/7/2021 UNT PHYS 2240 Lab ENG_PHYS_2 E&M_FALL_2020 - Alymjan Rejepov/Experiment 8: Magnetic Field in a Current Carrying Coil/Experi…

https://mynotebook.labarchives.com/entries/print_page/ODk3MTg5Ljh8NjkwMTQ2LzY5MDE0Ni9Ob3RlYm9vay8zMDk5ODg2MTM4fDIyNzc0ODEuO… 5/5

1. On the axis, there should be no perpendicular field due to the symmetry of the system. There is probably a small radial field due to failure to get the sensor right on the axis. Does the field appear small for the "Center" run? Click the black triangle by the Run Select icon on the graph toolbar. Click "Center" to de-select it. The "East" and "West" runs should still show.

2. Note that the positive direction for the radial field is coming out of the side of the sensor with the labels on it. Explain why the "East" radial field looks the way it does.

3. Explain why the "West" radial field look the way it does.

4. Click on the black triangle by the Run Select icon and select "East Reversed" and click on "East" to de-select it. Explain why “West” and “East Reversed” appear different.

5. Sketch the radial field data.