Chapter 17 - Electric Potential

electric potential

Electric potential energy per unit charge

Breakdown

Occurs in air when electric field exceeds about 3 ∗ 106V /m, electrons are knocked outof molecules in air

Equipotential Surface

A surface where all points are at the same potential

Electron Volt

Symbol is eV, unit of energy equivalent to one elementary charge moving through 1V of potential difference

Electric Dipole

Two point charges of opposite charge but equal magnitude, divided by a distance

Dipole Moment

Potential difference cause by a dipole at an arbitrary point, equal to distance between charge times magnitude of charge

Polar Molecules

Molecules that have a dipole moment

Capacitor

A device that can store electrical charge, consisting of two conducting objects placed neareach other

Signal Voltage

A variable voltage used to affect something else

Quantization Error

Loss in the original analog signal by an analog to digital converter, can bemitigated by increasing bit depth and sampling rate

CRT

Stands for Cathode Ray Tube, a device that depends on thermionic emission, allows fordeflection of an electron beam

Electrocardiogram (EKG)

Used to record tha potential changes in a person’s heart