Electrostatic Series: Does Rubber & Glass Affect Charged Comb?

[jwj11]

Homework Statement

This is just a thought experiment and I wanted to know if my answer is correct.

If I...
1) Tie a string to one of the plastic combs and suspend this comb from the edge of a table
2) Then rub the suspended plastic comb in wool to give it a negative charge
3) and If I bring a piece of glass near the charged suspended comb
4) or if I bring a piece of rubber near the charged suspended comb

Then for the glass I will observe that the charged comb will move away from the glass.

And for the rubber I will observe that the charged comb moves toward the rubber.

This is because glass has low electronegativity and rubber has a high electronegativity on the electrostatic series?

Would my hypothesis be correct?

 

[Carid]

hey jwj11,
Why do a thought experiment when you can do a real one. Much more fun and more likely to give the right answer...

 

[jwj11]

because when I did it both of the materials were attracted to the charged comb? How am I suppose to differentiate which is more electronegative?

 

[Carid]

jwj11,

You wrote your hypothesis...
3) and If I bring a piece of glass near the charged suspended comb
4) or if I bring a piece of rubber near the charged suspended comb
Then for the glass I will observe that the charged comb will move away from the glass.
And for the rubber I will observe that the charged comb moves toward the rubber.

and you wrote your experience..
because when I did it both of the materials were attracted to the charged comb

Now what exactly is the problem?