all you need to know about coulomb's law
...ach of them. · Coulomb’s Law F=(k)(Q1)(Q2)/R sq not sure but I think this is used when forces are at rest · K = 9.0 * 10^9 · Coulomb – SI unit commonly used today · Elementary charge – 1.602 * 10^ -19 · The direction of the electric force is always along the line joining the two objects. · When several charges are present the net force will be the vector sum of the forces due to each of the others · Simple review of Vectors · An electric field extends outward from every charge and permeates all of space. When a second charge is placed near the first charge, it feels a force because of the magnetic field that is there. · E = F/q E = N/C · E = k(Q)/r squared · E is independent of test charge and only dependant on charge Q which produces the field · When the field is due to more than one charge, the individual fields due to each charge are added vectorially. · If q is positive, then F and E will point in the same direction. If q is negative, F and E point in opposite directions. · The electric field lines are drawn so they indicate the direction of force due to the given field. · The number of lines starting on a possible charge, or ending on a negative charge is proportional to the magnitude of the charge. · The closer the lines are together, the stronger the electric field in that region. · The electric field inside a good conductor is zero in the static situation – when the charges are at rest. · Reasoning – The electrons would move until they reached positions where the electric field, and therefore the electric force on them, did become zero. · Then any net charge on a good conductor distributes itself on the surface. · Inside a nonconductor which does not have free electrons, an electric field can exist. Picture 17-1 in book · When charge is released, the electric force will do work n the charge and accelerate it toward the negative plate. In the process, the charged particle will have its potential energy increased. The potential energy will be decreased by an equal amount, equal to the negative of the work done by the electric force. · A positive charge has its greatest potential energy near the positive plate and vice versa for negative charges. · Electric potential energy – Va = Pea/q · Vab = Va-Vb = -Wba/q · Electric potential energy unit – joules/coulomb – volt · Potential difference = Voltage · W = qVab = Fd = qEd · ASK QUESTION ON PARAGRAPH BELOW EXAMPLE 17.2 Equipotential surface is one on which all points are at the same potential. That means the potential difference between any two points on the surface is zero, and no other work is required to move a charge from one point to another. An equipotential surface must be · One electron volt is defined as the energy acquired by a particle carrying a charge equal to that of the electron. · 1eV = 1.6 * 10^-19 J · Electron volt is not a proper SI unit!!!!!! Section 17.5 · V = k(Q)0r · The potential near a positive charge is large, and it decreases tow...