Physics Test Review- Ch 22

If you rub an inflated balloon against your hair and place the balloon against the wall it will stick to the wall, illustrating Coulomb's law conduction and insulation charge polarization voltage

charge polarization

The vast numbers of electrons in a coin don't fly off the surface because mutual repulsion is incomplete. they are attracted by an equal number of protons they are strongly bonded to their atoms all of the above none of the above

they are attracted by an equal number of protons.

Two charges that are separated by one meter exert 1-N forces on each other. If the magnitude of each charge is doubled, the force on each charge is 1 N 2 N 4 N 8 N none of these

4 N

A common naturally-polarized bit of matter is an electron a hydrogen atom a water molecule all of these none of these

a water molecule

Superconductors are noted for their high electric resistance low electric resistance absence of electric resistance low cost bright colors.

absence of electric resistance

Between a pair of equal and opposite charges, field lines are directed from positive to negative. more concentrated closer to the charges vectors, with patterns that stem from the inverse-square law all of these none of these

all of these

Electric charge distributes itself on conducting surfaces with greater concentration on more curved parts such that the electric field inside is zero both of the above none of the above

both of the above

Every isolated proton in the universe is surrounded by its own electric field gravitational field both of these neither of these

both of these

The electrical force between electric charges depends only on their magnitude separation distance both of these none of these

both of these

Electrostatics is a branch of electricity that focuses on electrical charge electrical force both of these when static none of these

both of these when static

The fundamental force underlying all chemical reactions is gravitational nuclear centripetal electrical none of these

electrical

To become a negative ion, an atom must lose an electron gain an electron lose a proton gain a proton

gain an electron

A positive charge and a negative charge held a certain distance apart are released. As they move, the force on each particle increases decreases stays the same

increases

It is said that electric charge is quantized, which means that the charge on an object may occur in an infinite variety of quantities. is a whole-number multiple of the charge of one electron will interact with neighboring electric charges can be neither created nor destroyed is sometimes positive

is a whole-number multiple of the charge of one electron

To say that an object becomes electrically polarized means that it is electrically charged its charges have been rearranged. its internal electric field is zero it is only partially conducting none of the above

its charges have been rearranged.

Conducting materials are composed of atoms with strong cohesive forces between them loose outer electrons excess neutrons compared with protons vastly more charge than insulators

loose outer electrons

Superconductors most often require low operating temperatures high operating temperatures magnets.

low operating temperatures

If you comb your hair and the comb becomes positively charged, then your hair becomes positively charged negatively charged uncharged

negatively charged

Which of these does NOT have an electrical charge? proton electron neutron all of the above none of the above

neutron

Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is halved, then the force will be F 2F F/2 F/4 none of these

none of these

Two charged particles held a certain distance apart are released. As they move, the force on each particle increases. Therefore, their charges have the same sign opposite signs the same mass the same size need more information

opposite signs

If electrons are stripped from an atom it becomes a positive ion negative ion different element molecule

positive ion

When the distance between two charges is halved, the electrical force between them is reduced by 1/4. halves• doubles quadruples none of these

quadruples

A main difference between gravitational and electric forces is that electrical forces attract repel or attract obey the inverse square law act over shorter distances are weaker

repel or attract

The electric field between oppositely-charged parallel plates is uniform stronger at the ends composed of field lines in opposite directions none of the above

uniform