Q. 4

Expert-verified
Found in: Page 624

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

A glass rod that has been charged to +12 nC touches a metal sphere. Afterward, the rod’s charge is +8.0 nC. a. What kind of charged particle was transferred between the rod and the sphere, and in which direction? That is, did it move from the rod to the sphere or from the sphere to the rod? b. How many charged particles were transferred?

a. The electrons move from metal sphere to glass rod.

b. were transferred.

See the step by step solution

Step 1: Content Introduction

According to the principle of quantization Any body's charge is an integral multiple of the charge on the integral. Furthermore, when electrons are taken from a body, the body's negative charge is also lost. A body becomes positively charged as a result of this.

Step 2: Explanation (part a)

We are given that the glass rod has a charge and after it touches the metal sphere the charge changes to

So metal sphere charge is

The sphere is positively charged because the sphere is charged to by the rod. The electrons removed from the sphere and this is the only way to make the sphere charged positively where protons could not be added to the sphere.

Step 3: Explanation (part b)

We have calculated the charge on the sphere as and we are given, .

The charge of metal sphere equals the number of carriers N times the carrier which is for electrons and for protons.