Name ______
Static Tape Lab
Materials needed:
Scotch brand Magic Tape
bar magnet
sharpie
mechanical pencil
Background: When Magic Tape is removed from another piece of Magic Tape, charges are added to one piece and taken from another. Thus the tape becomes electrically charged.
Procedure:
1. Each lab partner prepares three layers of tape.
a) Tear off a piece of Magic tape a little longer than the length of your hand.
b) Fold one end under (about a 1/2 inch) to make a tab.
c) Place this piece of tape onto your desk. This piece of tape will stay on your desk for the entire experiment.
d) Add another layer of tape, again folding one end under to form a tab. With the Sharpie write B on the tab. This will be your bottom tape.
e) Add one more layer in the same way. With the Sharpie write T on the tab. This will be your top tape.
2. Investigating B vs T charges on tape:
a) As one unit carefully remove the B & T tapes from the very first piece of tape.
b) Run your finger along the NON-STICKY/T side a couple times.
c) Quickly separate the B & T tapes from one another.
d) Slowly bring the NON-STICKY sides of the B & T tapes toward one another.
e) What interaction is observed between B & T tapes? Draw a “line” picture below to show what the tapes did when brought toward each other.
f) Bring the B & T tapes different distances toward one another (NON-STICKY SIDE).
g) Draw a “line” picture below to show what the tapes did when they were a short distance apart.
h) Draw a “line” picture below to show what the tapes did when they were a farther apart.
i) What was the difference in the behavior of the tapes at different distances?
j) Did the B & T tapes repel or attract each other when brought together? ______
k) If the charges are opposite from one another they will ______one another.
3. Investigating like charges on tape:
a) Using the NON-STICKY sides. Bring your T tape toward your partners T tape.
b) Repeat changing the distances between the two T tapes.
c) Draw a “line” picture below to show what the tapes did when they were a short distance apart.
d) Draw a “line” picture below to show what the tapes did when they were a farther apart.
e) What was the difference in the behavior of the tapes at different distances?
f) Make a prediction about what you think will happen if two B tapes are brought toward each other.
g)Using the NON-STICKY sides. Bring your B tape toward your partners B tape.
h) Repeat changing the distances between the two B tapes.
i) Draw a “line” picture below to show what the tapes did when they were a short distance apart.
j) Draw a “line” picture below to show what the tapes did when they were a farther apart.
k) What was the difference in the behavior of the tapes at different distances?
l) When two of the same tapes were brought together did they repel or attract? ______
m) If objects have the same charge then they will ______one another.
4. Interaction with a bar magnet.
a) Attach your B & T tapes to the bottom edge of your table.
b) Being sure that you are holding the magnet by the very end, bring the other end of the bar magnet toward each tape.
c) Describe or draw the interaction between the magnet and the charged tapes.
5. Be a Detective: Determine which tape is negative and which is positive.
a) Prepare a B & T and make sure that they are charged by seeing that each is attracted to one another.
b) Rub a plastic mechanical pencil through your hair to give it a negative charge.
c) Determine the charge of each tape & explain how this was determined.
6. Distance Experiment:
Determine the effect of distance on the interaction between the pencil and B & T tapes. Be sure to test this on both tapes.
IV ______
DV ______
Procedure:
Results:
Conclusion:
7. Amount of charge Experiment:
Determine the effect the amount of charge on the pencil has on the interaction between the pencil and B & T tapes. Be sure to test this on both tapes.
IV ______
DV ______
Procedure:
Results:
Conclusion:
Final conclusions:
a) “Opposite charges ______while like charges ______.”
b) Describe the effect of distance on the interaction of charged objects.
c) Describe the effect of amount of charge on the interaction of charged objects.