Electric Fields, Forces, and Potentials Flashcards
Fundamental carrier of negative charge:
electron with charge = -1.6e-19 C
Equilibrium Charge
the average of the two charges (ex. a +6 particle being rubbed up against a -2 particle and then having them separated results in a net charge of +1 C on both particles).
Coulomb’s law
Fe = Kq1q1/r^2, where k = 9e9 Nm^2/C^2
Conduction Definition
the transfer of charge by actual contact. A conductor (usually a metal) has electrons that are loosely bound to the outskirts of their atoms and can therefore easily move from one atom to another.
Insulator Definition
An insulator, like wood or glass, does not have many loosely bound electrons, and therefore cannot pass charge easily.
Magnitude of Electric Field Equation
E = F/q
Electric Field Definition
the force per unit charge in a region of space
Electric Field Lines Direction
away from a positive charge and towards a negative charge (they are drawn in the direction a POSITIVE charge would move)
Electric Potential Definition
The work we would have to do on a charge to move it against an electric field.
Electric Potential Equation
V = Work/q, (V)
Electric Field between two charged plates
E = V/d
Electric potential energy
U = qV
To find velocity/mass/if “an object starts at rest…”
.5mv^2 - .5qV
Capacitance equation
q/V
Energy on a capacitor
.5CV^2
