Fall 2000 Physics 272 Computer Exercises:
Notes for computer exercises : These are fun and easy
exercises designed to help develop physical intuition .
To print out the results on a PC, hit the PrintScreen Key to
save the plot from a JAVA applet. Then go to Word, Word Pad or
Paint, and click Paste on the Edit Menu. You should then see the
plot and be able to print by clicking Print from the File Menu. On
UNIX, use a screen capture program. (If you have a problem printing
out the result, it is acceptable to hand in a sketch drawn by hand.)
Computer Exercise 1. Sketch some representative E field
lines for the charge configuration given in problem 40 of
Chapter 22 of the Text.
Computer Exercise 2. Flip the switch to charge up the
capacitor. Flip the switch to discharge the capacitor. Sketch
the voltage across the capacitor as a function of time.
Computer Exercise 3. Sketch the motion for two cases:
(a) when E and B are perpendicular (no initial
velocity). Launch in the default configuration.
(b) for the
case of no electric field (initial velocity in the x -z plane)
Computer Exercise 4. Sketch the direction of the induced
current for two cases:
(a) when tugging the coil to the
(b) when tugging the coil to the right
Note that the
induced current vanishes when you hold the coil fixed.
Computer Exercise 5. Sketch the image and principal rays
(I) a converging lens
(II) a diverging lens
(III) a diverging mirror
when the red arrow is placed (a) at
the focal point (b) in front of the focal point (c) behind the focal
last revised 14 August 2000, jgl.