1)two short paragraphs for the point charge Where do you think the electric field is strongest? where is it weakest?Do the results make sense with theory? How does it compare to the electric field and equipotential of a dipole? Explain

Phys 3B - E&M Electric Fields Experiment 3: Finding E-field from Voltage Equipotentials 3. Using the digital voltmeter, map out all points which lie on the 2 Volt equipotential line in the carbon paper. Do not draw on the conducting paper! Enter your data points using the grids on the paper provided to you. Make sure you have enough points to determine the correct shape of the equipotential line. 4. Use this method to find the 3 volt, 4 volt, .... 8 volt equipotential lines. Continue to draw the equipotential lines on the given grids. Sketch the completed equipotenial lines below. 5. Use your equipotential lines to draw your electric fields. Use the characteristics of electric fields as mentioned above to draw the electric fields on your paper. You should have at lea three electric field lines, one of which connects the two terminals. Indicate the direction of t electric field lines on your paper. 6. Where do you think the electric field is strongest? Where is is weakest? To find out, find average electric field along the center electric field line by using | | = _, where AV is the change in potential between adjacent equipotential surfaces and Ax is the distance between adjacent equipotential surfaces. 16 3 2 8 - 7V 7 - 6V 6-5V 5-4V 4-3V 3-2V AV (V) 1 V 1 V 1 V 1 V 1 V 1 V Ax (m) Got 06081 10 . 094 0.103 E (V /m) 25 19.2 15.4 12.3 Do your results make sense with theory? How does it compare to the electric field and equipotential of a dipole? Explain.Phys 3B - E&M Electric Fields Experiment 3: Finding E-field from Voltage Equipotentials Activity 2: Finding the Potential in a Parallel Plate Capacitor 1. Repeat the steps from Activity 1 for the parallel plates. Make sure that your voltmeter reads a 10-volt difference between each plate. Include points in between the plates as well as the regions below and above the plates. Find the equipotential surfaces for 9 volts, 8 volts, etc. 2. Draw your equipotential surfaces and electric fields on the grid paper and sketch below. 3. Calculate the strength of the electric field along an electric field line. 9 - 8V 8 - 7 V 7 - 6V 6-5V 5- 4V 4-3V 3 - 2V 2-1V AV (V) 1 V 1 V 1 V 1 V 1 V 1 V 1 V 1 V Ax (m) 01031 10.049 10.05 6 0.074 0. 084 0 09 9 01417 1 0 133 E (V /m) 32. 3 20,4 17. 13.5 /110 9 10 .1 14. 55 | 7.52 Where is electric field strongest? Where is it weakest? Does this agree with theory? What happ to the electric field as in the regions below and above the plates? Activity 3: Finding the Potential from a Single Line Charge 1. Obtain the conducting sheet with a single terminal surrounded by a circle. Repeat the step outlined in Activity 1 to find the equipotential surfaces for 9 volts, 8 volts, etc. 2. Draw the equipotential surfaces and electric fields on your grid sheets and sketch below.Phys 3B - E&M Experiment 3: Finding E-field from Voltage Electric Fields Equipotentials 3. You will now find the electric field at various distances from the center of the ring. Find the prongs and measure the distance between each prong carefully (This distance is Ax. You would use Vernier calipers for this measurement). Use the prongs to measure the voltage change over a small distance. This will allow you to calculate the electric field at various positions on the paper. Fill in the table below. Use the table to plot the electric field vs. the radial position on excel. NOTE: The radial position is measured from the center to the midpoint of the two prongs. Ax = r (m) AV (V) |EI = AV/Ax (V/m) 0: 016 V 358. 0.029 0 .75V 268. 8 0, 040 10 . 57V 204: 3 Electric field, E (V/m) 0.049 0.40 1:43, 4 0.058 71.68 57:35 Position, r(m) How is the electric field proportional to the radial distance? Fit your data to a curve (power line in excel) and obtain the exponent of r. Does this agree with theory concerning a line of charge? You will write a formal lab report for this lab with two sections, one for each distribution, presenting the data and analysis. The conclusion will summarize your results and describe the relationship between electric field and potential