A quarter of 24.26 mm diameter is given a charge of + 10 nC.The potential energy of an electron 1 cm above the quarter is

Question

Quizplus · Accepted Answer

The potential energy of an electron at a distance r from a point charge q is given by:U = k * q * e / rwhere k is Coulomb's constant, q is the charge of the point charge, e is the charge of the electron, and r is the distance between the point charge and the electron.In this problem, the charge of the point charge is +10 nC, the charge of the electron is -1.602 * 10^-19 C, and the distance between the point charge and the electron is 1 cm = 0.01 m.Substituting these values into the equation above, we get:U = (9 * 10^9 N m^2 / C^2) * (10 * 10^-9 C) * (-1.602 * 10^-19 C) / (0.01 m)U = -1.12 * 10^-15 JTherefore, the potential energy of an electron 1 cm above the quarter is -1.12 * 10^-15 J.

A Quarter of 24