# University of Central Florida Chemistry Question

Very simple assignments, please read the instructions carefully to know what you should do.

These two assignments are very easy, and it will not take more than half-hour to complete them. So please try your best to do it.

There are two parts of assignments:

Assignment 1)

This is the link for the video:

https://we.tl/t-GLNKiFogqB

The duration of the video is just three minutes. Please open the link and watch the video. Please let me know if the link doesn’t work.

Information:

• Demonstrate knowledge in linear analysis of a coil system
• Learn fundamental concepts of field lines through a coil system
• Display knowledge in circuit construction

Instructions:

Part I

Background for the system

The solenoid is a coil system which is long typically greater than the diameter of its cross section. It consists of tightly would conducting wires with an N number of turns. It generates a magnetic field through its volume. But, along its axis, depending on which way the current is flowing through the wires, the field has a particular value and points axially. The field generated by a solenoid along the axis (through the center) is

𝐵=𝜇0𝑁𝐿𝐼$B={\mu }_{0}\frac{N}{L}I$

In the above equation, 𝜇0${\mu }_{0}$ is the constant of permeability of free space, 𝐼$I$ is the current through the windings, and 𝑁𝐿$\frac{N}{L}$ is the number of turns per unit length. For this lab, 𝑁𝐿=1000$\frac{N}{L}=\phantom{\rule{0ex}{0ex}}1000$.

Lab instructions: [Review your textbook for information about the solenoid. Study every aspect presented.]

1. Review the video to collect your data. NOTE: If you read the current off of the power-supply (BK-Precision on the lower reading), you have more sig figs. Notice any fluctuations and wait until the Tesla meter settles!. Column A in Excel is current (in Amps). Column B is magnetic field (mT). Column C is (column B)/1000 to convert to Tesla (T). Column D is (column C)/1,000. You are dividing your turns per length in this last step.Make sure Column A is in Amps!!

2. Plot Column D vs. Column A. Clearly label the graph for presentation with the correct units. Is it linear? What SHOULD be the slope?

3. Run a LINEST with the dependent being column D and independent being column A. Record the slope and its uncertainty. Does it seem reasonable? What are the units?

4. What is the percent difference between the actual value and the slope?

5. Save and upload the file.

Part II

1. Open up the power-point file.

2. On the first slide, draw the magnetic field lines coming out of the cross-section. Note the direction of the current. You must draw these in the right direction and place arrows on your field lines for credit.

3. On the next slide, use the "wires" to connect up the experiment. Place the meter where it belongs to do a proper measurement. Take the values given at the top. After you have positioned everything and is connected up (note that you click on and grab a wire and change its length to connect everything), use Insert/textboxto place the value of the magnetic field (in mT) in the blanks on the meter. NOTE: The dot on the probe is the sensor that measures the field!!

Important: You can move the meters and items around any way you like!

4. Save and upload the file.

Part III

Review the instructional videos regarding induction and generators respectively. (1) First watch the review of magnetic flux and a description of the tasks to perform. (2) Then watch the video with the demonstrations to be able to address the tasks you are asked to perform. All of the information will be provided in the demonstration.

Put all work on a document and save as pdf. Upload the file in the link provided.

Video:

Watch this video ( Data collection video). The video is only three minutes long. This is the link for the video: https://we.tl/t-GLNKiFogqB

Assignment 2:

This part of the assignment is very easy and it will not take more than half-hour to complete it. I uploaded the PowerPoint file for this assignment, you have to open the file and complete this part of the assignment