Answered: Three small pieces of electrically…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Three small pieces of electrically neutral paper are placed far
apart from one another on a table. One piece is given a negative
electric charge, one is given a positive charge, and one is left
neutral. They all look identical, and in order to tell which is
which, a student runs a comb through her hair and waves the
comb over each piece. She observes that one is strongly attracted
to the comb; she labels this A. She observes that another is
weakly attracted to the comb; she labels this B. The last piece,
which is repelled by the comb; she labels C. Which piece is
positive, which is negative, and which is neutral?

Expert Solution

Step 1

There are attractive force exerts between opposite type charges (between positive and negative charges)
There are repulsive force exerts between two similar charges (between positive -positive charges OR between two negative charges)

As we rub the comb with hair, electrons are move from hair to comb therefore comb becomes negatively charged.

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