STATION 1
ELECTRO STATIC BOX
Notice the 2 Gold Foil leaves attached to the
end of the electrode.
Charge your plastic rod with fur by rubbing it
vigorously. Then move the rod towards the
electrode watching what the leaves do.
After touching the rod to the electrode
repeat the experiment using the silk
PRODUCT- DIAGRAM THE FLOW OF
CHARGES FROM THE ROD TO THE
LEAVES OF THE BOX
11. In an experiment, three microscopic latex spheres are sprayed into a chamber and become
charged with !3e, !5e, and "3e, respectively. Later, all three spheres collide simultaneously and
then separate. Which of the following are possible values for the final charges on the spheres?
Select two answers.
X
Y
Z
(A)+4e
-4e
+5e
(B) -4e
+4.5e
+4.5e
(C) +5e
-8e
-7e
(D) +6e
+6e
-7e
(E) -6
+3
+3
STATION 3
PITH BALLS
In this set up you have 1 pith ball hanging by
itself, then two with balls hanging together.
Charge the plastic rod by rubbing it with the
fur pad. Then move it towards the individual
pith ball and note what happens.
Discharge the pith ball by touching it with
your hand.
Now experiment with the double pith balls
by charging one ball, then both balls.
PRODUCT DRAW THE CHARGE TRANSFER
BETWEEN THE ROD AND BALLS
Students charge two balloons exactly the same way to approximately the same charge on each
balloon. Balloon #1 is held in place while the force on balloon #2 is measured at location A.
Keeping balloon #1 held in place, balloon #2 is moved to location B and the force is measured
again. How does the force on balloon #2 change after being moved from location A to B?
A.
B.
C.
D.
The force increases and remains in the same direction
The force increases and changes direction
The force decreases and remains in the same direction
The force decreases and changes direction
STATION 2
ELECTRIC FIELDS
Measure the distance between the 2 metal
pins on the conductive paper in meters.
Voltmeter to measure the amount of volts at
different places on the conductive paper.
Create a diagram by connecting areas of
similar voltage (equi potential lines)
Examine how the field is shaped.
Two small spheres have equal charges (q) and are separated by a distance (d).
PRODUCT DIAGRAM OF THE VARYING FIELDS The force exerted on each sphere by the other has a magnitude F. If the
CREATED BY THE TWO CHARGES
charges on each sphere are doubled and the distance is halved the force on
each sphere has a magnitude of:
a. F
b. 2F
c. 4F
d. 8F
e. 16F