Electric Charge and Lab Report Assistant

Topics: Electric charge, Rubbing, Tape Pages: 5 (1249 words) Published: August 5, 2013
Static Electricity or Electrostatics

Peter Jeschofnig, Ph.D. Version 42-0278-00-01

Lab Report Assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Observations
Questions
Part 1

A. What happened when you brought the rubbed ruler close to the paper, salt, and pepper? * the salt and pepper and the little papers had friction and got attracted to the ruler.

1. Were all three substances affected equally?
- No only friction because rubbing was only done.

2. What explanations can you offer for why this happened?
- I suggest that this happened because when you rub two things hardly obviously there is friction going on. Also I tried it with my hair even though that wasn’t told but the same results happened. The rest of the substances did not occur because they were not instructed to apply.

B. What combinations of cloth and ruler seemed to produce the greatest effects? * The rabbit fur and the red cloth. But the greatest was the fur.

Part 2

A. Why do you think the charged ruler affected the original suspended strip as it did? * Because of the static the tape had while it charged in the desktop. As I pulled the tape it was charged so the ruler attracted the tape because I also charged the ruler with the rabbit fur.

B. What happened when you brought the two separated tapes close to each other? What explanations can you offer for this? - they were attracted to each other I believe that because they both have opposite charges so that is why they can attract each other.

B. How many types of charge did you work with in this exercise? How do you know? * I worked on 2 charges because I worked with tapes that I charged in the desktop doing the same procidures just charging them with the desktop. And also the ruler that I also charged to be able to attract it to the tape but the ruler I attracted it with the rabbit fur.

C. If a third type of charge existed, how would it affect the two oppositely charged strips in this activity? * It depends with what you are going to charge it with. For example if you charge it with a glass or maybe a plastic bag or also your hair you can also get static so the tape can also attract with the objects that I mentioned. It would be the same thing it won’t affect anything the only difference is with what is being charged which will not make a difference. Same procedure.

D. Why do you think the charged ruler affected the two suspended tapes as it did? * I think it affected the tapes because of the amount of time and force I rubbed the ruler with the rabbit fur.

F.How would you explain the attraction or repulsion between each of the suspended tapes and the uncharged paper strip?

* Because the suspended tapes had been charged on the desktop and the uncharged strip was just attracted to the tapes that were charged. Since the uncharged strip had not been charged with anything.

G. How would you explain the fact that a charged ruler can attract an uncharged object like the paper bits, salt and pepper?

* Because of the power the charge has while the ruler was being rubbed in the desktop. Obviously you had to rub hard until you could feel heat transferring. That is what we call static two objects rubbing each other. You can’t expect to pick up a book with the ruler because the mass of the book is heavy. Rubbing...
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