Question

A student rubs a plastic rod with a cloth. Describe experiments the student could do to show that there are two types of electric charge.

@BioEpic I heard that you are good with physics, could I possibly ask for your help? :D Thank y'all in advance ^.^

Answer 1

http://www.twothirtyvolts.org.uk/pdfs/education/student-revision-notes/Electric_Charge_11_14_Student_Revision_Notes.pdf

Answer 2

The rod gains negative charge and cloth gains positive because it is easier for a cloth to lose electrons even on supplying very small energy while rubbing.

Answer 3

One simple experiment would be to hook up an electrometer to the rod, or you can touch the rod and feel the shock from electrons.

Answer 4

Would the electrometer be cheating?

Answer 5

@BioEpic ahhh- an electroscope, I think that would work! I was getting confused whether I should write about an electroscope or suspend the rod and the plastic rod to see if they attract or something =/
I get four marks for this question, so I think if I describe it in detail I'll be able to get it right.
Thank you so much for your help :D
Is it okay if I ask you another question I'm confused with?

Answer 6

Sure.

Answer 7

Would you be surprised if I said I was 13 years old?

Answer 8

@BioEpic Thank :)
Ahh, you must be a clever person ^.^ I'm 13 too :)

Answer 9

Lol.

Answer 10

Wow.

Answer 11

XD

Answer 12

What's your next question, @strawberrysorbet ?

Answer 13

A teacher uses a Van Der graff generater to give another student a negative charge. Use ideas about electric charge to explain why the students hair stands on end - I know that this is because the electrons in his hair repel the negative electric charge.

However, as the question continues on it says "the student decides to use her plastic rod which takes negative charge to decide which of three other rods takes the biggest positive charge. Describe how she could do it and reach her conclusion (an electroscope is not available) and suggest and explain two variables" <-- that's what I'm confused with. I think this is linked ot the first question.

Answer 14

@BioEpic

Answer 15

Hmmm.

Answer 16

You basically need an experiment that takes the place of an electrometer.

Answer 17

After that, defining two variables will be easy.

Answer 18

This experiment would be.. ?

Answer 19

To the moderator who issued me a warning: I am sorry for giving direct answers.

Answer 20

I am not sure of the experiment.

Answer 21

Try asking @Abhisar.

Answer 22

Sorry :(

Answer 23

Bye the way, who told you that I am good at physics?

Answer 24

You got a warning? :O

Answer 25

@HisOnlyForever told me xD

Answer 26

@Abhisar Could you help with this question?

Answer 27

really no idea about this one !

Answer 28

@Abhisar ah okay :(

Answer 29

hmm..is anyone else good at physics on here?

Answer 30

Help.
@amistre64 @agent0smith @adrynicoleb @anonymous_user @AnonymousBeast @bbbco123 @brriiarr @BassCatcher15 @beastieman21 @Catch.me @Cupcakequeen @Data_LG2 @deshawn1 @Drii_salsa @eliassaab @emmigrace222 @Elsa213 @egrriecya

Answer 31

I don't take/know anything about physics. Sorry Berry >.<

Answer 32

@whisperz

Answer 33

Wow @BioEpic THANKS A BUNCH!

Answer 34

??

Answer 35

can u help @strawberrysorbet

Answer 36

I apologize, I'm not exactly of age to have taken a physics class yet.

Answer 37

No problem, @strawberrysorbet

Answer 38

I try to help! :)

Answer 39

@AnonymousBeast No problem :)

Answer 40

Guess, I'll just have to wait now.

Answer 41

Im so sorry this question is hard. I think @Luigi0210 can help but im not sure

Answer 42

@DangerousJesse Could you help?

Answer 43

@Elsa213 No probs! Thanks a bunch!

Answer 44

@amistre64

Answer 45

Sure, what's your question?

Answer 46

@DangerousJesse Thanks! Just above as you can see is the question I'm kinda stuck on:

A teacher uses a Van Der graff generater to give another student a negative charge. Use ideas about electric charge to explain why the students hair stands on end - I know that this is because the electrons in his hair repel the negative electric charge.

However, as the question continues on it says "the student decides to use her plastic rod which takes negative charge to decide which of three other rods takes the biggest positive charge. Describe how she could do it and reach her conclusion (an electroscope is not available) and suggest and explain two variables" <-- that's what I'm confused with. I think this is linked to the very first question on this post.

I need an experiment- that does not use an electroscope- but i'm not sure what? =/

Answer 47

I guess she could charge all 3 to their "maximum charge" somehow then drop them one by one from the same height through the centre of a wire loop while measuring the voltage across the loop. If the rods are the same length she should see three very similarly shaped pulses with the maximum voltage representing maximum charge. If they are different lengths it gets a bit more complicated though and why would she need her negatively charged test rod? I don't think this is the answer you are looking for.

Source: Yahoo

Answer 48

hmmm..

Answer 49

Interesting.. I think I might use that..bits of it

Answer 50

Thanks a bunch :D

Answer 51

Haha no problem.