Tape
Can
Foil
0.004-0.002
1089-400
++++++
二
0.002
689
= 2.90×10^{-6}
aluminum
(c) In a third experiment, students have various charged plastic disks that are on insulating handles. The amount of
charge on each disk is different, but in each case it is distributed uniformly. The students also have an
can with a strip of aluminum foil taped to it, so that most of the foil hangs free, as shown above. The apparatus is
placed on an insulating surface. Describe a procedure that would allow the students to use the apparatus to
compare the amount of charge on each of the disks without allowing anything to touch the disks.
one
and
at
a
time move
the disks
lose