Register to reply

How to distinguish the charge carry by different object after rub by something?

by henry407
Tags: carry, charge, distinguish, object
Share this thread:
Nov21-11, 04:19 AM
P: 21
1. The problem statement, all variables and given/known data
How to distinguish the charge carry by different object after rub by different things??

2. Relevant equations

3. The attempt at a solution
I do the experiment in the school, but every group got different answers,. So I hope someone chould give me the theory about my question, thanks~~
Phys.Org News Partner Science news on
'Office life' of bacteria may be their weak spot
Lunar explorers will walk at higher speeds than thought
Philips introduces BlueTouch, PulseRelief control for pain relief
Simon Bridge
Nov21-11, 07:55 AM
Sci Advisor
HW Helper
Simon Bridge's Avatar
P: 13,110
Please describe the experiment.

Historically it has been very difficult to determine the charge that gets transferred when different items get rubbed. Initialy it was thought that there were two kinds of electricity - the kind you get rubbing resin and plastic, and the kind you get rubbing glass.

Careful experimentation can show you that these two are opposites of the same thing - so that it is useful to think of one as the presence of something and the other it's absence. However, which it was took a long time to work out.

Wikipedia has an overview and history.

Register to reply

Related Discussions
Metal object and Charge Introductory Physics Homework 1
Why do capacitors 'in series' each carry the same charge? Introductory Physics Homework 6
Electrostatics - Which object has the (+) charge and which one has the (-) charge? Introductory Physics Homework 2
Why can't an object gain a (+) charge when rubbed against another? Classical Physics 7
How much work must be done to carry a +2.3 X 10^-3 C charge from 65 cm to 15 cm? Introductory Physics Homework 12