A glass rod is given positive charge by rubbing it against silk. The glass rod is thenrubbed against a metal slab (on an insulating stand), transferring the positive chargeon the rod to the slab. Which of the following statements is true concerning theelectric field at a point just outside the upper surface of the slab?It is zero because the electric field is always zero for isolated conductors.It is parallel to the surface.It is perpendicular to the surface.It can have nonzero components perpendicular to and parallel to the surface ofthe conductor.None of theseIt is zero because the electric fields of the positive charges will be cancelled out by theelectric fields of the electrons.

Answered: A glass rod is given positive charge by…

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

A glass rod is given positive charge by rubbing it against silk. The glass rod is then
rubbed against a metal slab (on an insulating stand), transferring the positive charge
on the rod to the slab. Which of the following statements is true concerning the
electric field at a point just outside the upper surface of the slab?
It is zero because the electric field is always zero for isolated conductors.
It is parallel to the surface.
It is perpendicular to the surface.
It can have nonzero components perpendicular to and parallel to the surface of
the conductor.
None of these
It is zero because the electric fields of the positive charges will be cancelled out by the
electric fields of the electrons.

Expert Solution

Step 1

Just after charge is transfered it will start to spread out on the surface and the component of electric fields that are parrallel to surface will move the charges till the parrallel components cancel out and charges are spread out evenly and equlibrium is attained.

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