RAD 156 electricity test 2
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/38
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
39 Terms
what are electrostatics
stationary electric charges
what are electrodynamics
charges in motion
what is electricity
the behavior of electric charges, usually considered the motion/flow of electrons
how are electrical charges measured
coloumbs
why are electrical charges used
is used because electricity most often results from the movement of electrons
what is a conductor
materials that have a very large number of free electrons
examales of conductors
Copper, aluminum, silver
what are insulators
materials that have very few available free electrons
example of insulator
glass plastic rubber
first principle of electrostatic
like charges repel
unlike charges attract
what is the second principle of electrostatic
coloumbs law
what is coloubs law?
the electrostatic force between two charges increases when the amount of charge increases
the electrostatic force between two charges decreases very rapidly as the distance between the charges increases
what is the relationship in coloumbs law
inverse square relationship
what is the third principle
movement
what does movement mean
electric charges reside on the external surface of solid conductors
what is the fourth principle
concentration
what is concentration
charges hangout and the sharpest/ greatest curvature part of the conductor
what is the fifth principle
distribution
what is distribution
charges hangout in low/high concentration until equilibrium is reached
what is electrification
process of charging an object by adding or subtracting electrons
what question can be asked when asking about methods of electrification
How did this object become charged?
what are the three methods of electrification
friction, contact, induction
what is frictions interaction
Two neutral objects (usually insulators)
what happens in friction
electrons transfer because the materials have different electron affinities = both objects become oppositely charged
what is contacts (conduction) interation
One charged conductor and one neutral conductor
what happens in contact (condiction) interaction
electrons transfer directly through contact until equilibrium is reached = The neutral object acquires the same type of charge as the charged object.
what is in induction interaction
one charged object brought near a neutral conductor
What is required for electrons to move?
electric potential or voltage
What is electric potential?
Ability to do work because of a separation of opposite charges
What is the unit of electric potential?
volt
1 Volt = ?
1 couloumb/ volt
what is current
An expression of the flow of electrons in a conductor
what is resistance
The property of an element in a circuit that resists or impedes the flow of electricity
currents measurement
ampere
what does the capicitor do in the xray tube
Temporarily stores an electric charge.
what does the diode do
a “one-way valve” device; allows electrons to flow in only one direction.
what does the resistor (rheostat) do
stops or slows flow of electrons
what does the switch do
device that opens the circuit
what does the transformer do
a device that can increase or decrease voltage by a predetermined amount.