electrostatics quiz

what is electrostatics

the study of electrical charge as rest; static electricity

when does an object become electrified

any time it develops either excess of electrons or a deficiency of electrons

what is electrostatics directly related to

ionization of atoms

what will a buildup be discharged as

a spark when the object is close to anything that will conduct electricity to or from the ground

what is the range of electricity being discharged

a small spark to lightening

what acts as a kind of infinite reservoir for electric charge

the ground of the earth

what is discharged when electrons flow down to the ground

a large amount of negative charge

T / F: objects with positive charge can receive large numbers of electrons from the ground when in contact with it or through a conductor

true

what does it mean when an object becomes grounded

the static electricity is no longer there

what is the unit for electrical charge

coulomb

what does one coulomb of negative charge equal and what does this also equal

6.3 × 10^18 electrons; slightly more than 6 billion billion electrons

sparks jumping to or from your fingertip may discharge what amount of charge

microcoulomb or 6.3 × 10 ^12 or b trillion electrons

can an electrical charge be positive and negative

yes it can be both

what does a positive charge of one coulomb mean

the object was deficient of 6.3 × 10^18 electrons

what there still be a spark when another object approaches a positive charge of 1 coulomb; how would the flow be

yes, the flow is from the other object to the positively charged object

in fluids where do free electrons drift

a positive plate

in fluids where do whole atoms that are positively charged drift to

a negative plate

in solids which electrons are locked into place and which ones can move freely

the atoms are locked in place with positive charged protons embedded deep within the nuclei and the electrons in the outermost shell of the atoms are free to move

what are the five laws of electrostatics

1. like charges repel each other and opposite charges attract

2. in solid objects only negative charges (electrons) can move

3. in solid objects electrical charges exist only on the surface (due to the first law)

4. in solid objects electrical charge will concentrate at the greatest curvature of the surface

5. the force of electric charge follows coulombs law

in the 3rd law of electrostatics “in solid objects electrical charges exist only on the surface” how does this relate to the first law

since like charges repel one another they move from the inside to the outer surface where they are evenly spread out as far away from each other as possible

in the 4th law of electrostatics “in solid objects electrical charge will concentrate at the greatest curvature of the surface” what is this due to

geometry which causes charges to be evenly distributed across the surface area but where it curves we find them to be more concentrated within the volume of space such as per cubic millimeter

in coulombs law what is proportional

the amount of force generated by electrical repulsion or attraction is proportional to the product of the two charges

in coulombs law what is inversely proportional

inversely proportional to the square of the distance between them

what is coulombs formula

what does the constant k stand for

units, coulombs to volts or newtons