Example 1  A Lot of Electrons

How many electrons are there in one coulomb of negative charge?

Reasoning  The negative charge is due to the presence of excess electrons, since they carry negative charge. Because an electron has a charge whose magnitude is e=1.60×10–19 C, the number of electrons is equal to the charge q divided by the charge e on each electron.

Solution The number N of electrons is



Copyright © 2000-2003 by John Wiley & Sons, Inc. or related companies. All rights reserved.