Lab2E-fieldandPotential

docx

School

University of Washington *

*We aren’t endorsed by this school

Course

222

Subject

Electrical Engineering

Date

Dec 6, 2023

Type

docx

Pages

Uploaded by JudgePower8923

Lab 2: Charges, Fields and Potential Lines 1. Using the voltmeter, record the potential V by drawing a green line on the screen at each distance. Fill in the table at the far right. Include a screenshot with all of the green circles. 2. Write the equation for the electric field at any distance r from a point charge q : 3. Write the equation for the potential at any distance r from a point charge q : 4. Using the table above, make a graph in Excel of electric field E and distance r to determine Coulomb’s constant k using the appropriate trendline. Hint: In Excel your trendline will not be straight – the equation for E(r) is not linear. You must ask Excel to apply a power trendline appropriate to your equation. This is called “curve fitting”. What power would you expect based on the equation? I expect a low value for the power based on the equation. 5. Insert the graph below and write down the k value that you found. Compare this value to the accepted value. Report your error as follows:

K = m/q = -5.35/1.6*10^-19 = -3.34375*10^-19 Vm/C 6. Using the table above, make a graph in Excel of voltage V and distance r to determine the constant k again using the appropriate trendline. (The same hint as above applies, but the work will be slightly different because the equation is different.) 7. Insert the graph below and write down the k value that you found. Compare this value to the known value using percent error/difference.

31. Remove the charges and place a positive charge in the center of the grid. Draw five equipotential circles with the potentials of 10 Volts, 8 Volts, 6 Volts, 4 Volts and 2 Volts. (It might be hard to get the precise values but try to get as close as you can). Take an electric field sensor and move it in a straight line, crossing the equipotential lines. Describe the relationship between the distance between the equipotential lines and the strength of the electric field. As the distance between the equipotential lines decreases, the electric field strength increases. This relationship is directly proportional. When the equipotential lines are closer together, the electric field is stronger. Conclusions: In conclusion, the charges have their own effect on the EF and its direction as in different activities it has been seen that we have done different findings in it and find out the electro potential and electric field strength at different points around the positive and negative charge. The different values in the readings have their own values which show the voltage across different points. The EF is established in a similar way when the charge is present. Positive and negative charges have its own values and their own direction of electric field strength. Charges establishes the EF when they exert force on each other.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version