Activity 19 Essay

684 WordsApr 1, 20153 Pages
Name Melanie Mickens_______________________ Equipotential Go to http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields and click on Run Now. Complete Part 1 for chapter 18 and part 2 and 3 for chapter 19. Part 1: What is an equipotential line and how is this simulation related to work and energy? They are like contour lines on a map which trace lines of equal altitude. 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential, in volts, created by the charge that you introduced. Record the voltage and turn on “Plot”. 3.7 V 4) This line is much like a line on a geologic topo map. Explain the…show more content…
1) Place a positive 1 nano-coulomb charge on the screen. 2) Turn on “Show numbers” 3) Turn on “tape measure”. 4) Use the tape measure to find and record the distance from the charge to the equipotential sensor. 2.03 m 5) Record the voltage as indicated on the equipotential sensor. 4.1 V 6) Change the location of the positive charge to at least six widely different distances from the equipotential sensor. Record the voltage reading and distance at each location. 7) Use “Excel” to plot these data sets. d(m) voltage(V) 2.03 4.1 2.04 5.6 4 2.1 3.8 0.72 2.91 2.3 2.57 11.8 8) What is the mathematical relation between these variables? m 9) Click on “Clear All” Part 3 What are the characteristics of the electric field sensors? 1) Place a positive 1 nano-coulomb charge at the center of the screen. 2) Click on “Show Numbers. 3) Bring out an electric field senor. 4) What are electric field units? 23653.2 V/m 5) Is the electric field a scalar or a vector? scalar 6) To do its job, the electric field senor should have a charge. Why? No charge means no force; no force means no effect; no effect means no sensor. 7) Does the field senor have a positive or negative charge.positive 8) Turn on the “Tape measure”. 9) As you sample the electric field further and further from a charged object, you find that the field strength weakens. Do you think the E field vs. distance relation is an inverse