Quiz 1 - not done (RADS 354)

the branch of physics which deals with stationary or resting electrical charges

-static means resting

Electrostatics

Electrical charges comes in...

discrete units and are either positive (Proton) or negative (Electron)

For protons and electrons which is larger?

Proton; as 1800 electrons = 1 proton

Forces for protons and neutrons are the...

same

Force of proton

out from the center

Force of electron

in toward the center

Unit of Force

Newton (nt) or Dyne

- 1 nt = 10 dyne

Atom construction

allows for electron to travel from atom to atom on the outside while protons are relatively fixed inside the nucleus so it doesn't move much

-So nearly all discussions of electrical charges deal with the electron movement

permit the flow of electrical charge through it or over it

ex. Copper, Gold, Silver, Aluminum, Ionic Solutions, & Vacuums (e- travel through a vacuum from cathode to anode)

Conductors

inhibits the flow of electrons

ex. rubber, plastic, glass, wood

Insulators, Nonconductors, Di-electrics

intermediate conductivity sometimes acting as a conductor (permitting the flow of e-), other times acting as an insulator (inhibiting e-)

ex. Silicon

Semiconductors

allow the flow of electrons without any resistance requiring extreme cold to function (used in MRI units not x-ray)

ex. Titanium, Riobium, Mercury, Zinc, Tin

Superconductors

the process of building up an electrical charge

Electrification

Methods of Electrification

friction, contact, induction

The scraping or removing of electrons from one object to another resulting in 2 charged objects of opposite charges

Electrification by Friction

Which is the simplest and most fundamental method of electrification?

Electrification by Friction

Involves a charged object being brought in contact with a neutral object resulting in 2 objects have like charges

Electrification by Contact

Involves a charged object being brought near a neutral object without contact, this causes a shift of electrons and two charged objects but it's only temporary unless grounded

-resulting in 2 oppositely charged objects

-utilizes metallic conductors

Electrification by Induction