Gen Physics Flashcards
Structure of The Atom
Protons, neutrons, and electrons
Proton and neutron in nucleus; electrons orbit nucleus
is the measure of ease at which an electric charge moves through a material
Conductivity
are materials that readily allow the flow of charges through them.
Conductors
are materials that resist the flow of charges
Insulators
are intermediate between conductors and insulators
Semiconductors
offer practically no resistance to the flow of charges below some critical temperatures.
SuperConductors
results when two different materials are rubbed together.
Charging by Friction
refers to the tendency of an atom to become negatively charge.
Electron Affinity
Requires a physical contact between a charging body and a neutral body.
Charging by conduction
Charge acquired by the neutral body is the same as the charge of the charged body
Charging by conduction
A neutral body becomes positively charged when charged by a positively charged body. Likewise, it becomes negatively charged when charged by a negatively charged body.
Charging by conduction
A neutral body may also be charged w/o physical contact with a charged body.
Charging by induction
The body to be charged is bought near to the charging body.
Charging by induction
The negative charges on the neutral body are attracted toward the charging body if the latter body is positive.
Charging by induction
According to the conservation of charge “The total charge of an isolated system remains _______.”
constant
Charges can neither be created nor destroyed
Conservation of charge
Coulomb showed in one of his experiments that when a sphere with an initial charge qo is brought in contact with an identically uncharged sphere, they _____________ the total charge.
equally share
If the spheres are not identical, they share the total charge according to their ______, with quantity of the charge directly proportional to their radii.
radii
If the spheres are not identical, they share the total charge according to their radii, with quantity of the charge ________ proportional to their radii.
directly
In any charging process, charges can merely be transferred from one body to another.
Conservation of charge
qo
initial charge
q
final charge
r
radius, distance
“The magnitude of the electric force between two charged particles is directly proportional to the product of the magnitude if the charges (q) and inversely proportional to the square of the distance (r) between them.”
Coulumb’s Law
Coulumb’s Law “The magnitude of the electric force between two charged particles is directly proportional to the product of the magnitude if the charges (q) and _________ to the square of the distance (r) between them.”
inversely proportional
Fe
The magnitude of the electric force (N)
q1 and q2
are the charges in coulumbs (c)
r
The distance in meters (m)
K
The coulumb’s constant
The coulomb’s constant
( 9x10^9 N∙m^2/c^2)
The force magnitude F is always _______.
positive
The vectors representing the force that is q1 exerts on q2 and vice versa on printing toward each other for _______ and away from each other for repulsion
attraction
The vectors representing the force that is q1 exerts on q2 and vice versa on printing toward each other for attraction and away from each other for ________.
repulsion
G
universal gravitational constant
universal gravitational constant
(6.674 x 10^-11N∙m^2/kg^2)
Similarities of Coulumb’s law and Newtons Law
- Follow the inverse square law for distance.
- Are also proportional to the product of the quantity that causes the force (mass and charge).
- Are conservative and nonconstant.
Difference of Coulumb’s law and Newtons Law
- Gravitational force is only an attractive force, while the electric force maybe attractive or repulsive.
- The gravitational force, in general, is much weaker.
