(Hint: Review Ch. 22 and 10 )
Question 1
Launch the electron for negative values of the field component. What is the sign
of the charge of the upper plate for these values. The lower plate?
Question 2
Launch the electron for positive values of the field component. What is
the sign of the charge of the upper plate for these values. The lower
plate?
Question 3
When the field component = +12 N/C, what is the value of the y-component of
velocity just before the electron hits the detector ? What is your answer
when field component = +8 N/C? +4 N/C? (Hint: use the time of flight and
Chapter 10 theory of projectile motion.)
Question 4 (Extra Credit)
Fill in the data table for a plot of the change in y vs Ey. You must
measure the change in y using click and drag.
E_{y} (N/C) | change in y |
-12 | |
-8 | |
-4 | |
4 | |
8 | |
12 |
Question 5
Plot the above data in Excel. From the slope of the line through the data
points, find the charge to mass ratio e/m. Compare with the theoretical
ratio by finding the percent error.