chapter 32

An electrically charged atom is an A) ion B) isotope C) both of these D) neither of these

A

An electron and a proton A) attract each other B) repel each other C) neither attract nor repel each other

A

Electrostatics is a branch of electricity that focuses on A) electrical charge B) electrical force C) both or these when static D) none of the above

A

Superconductors most often require A) low operating temparatures B) high operating temparures C) magnets

A

The electrical force between charges is strongest when the charges are A) close together B) far apart C) either of these D) need more information

A

To become a positive ion, an atom must A) lose an electron B) gain an electron C) lose a proton D) gain a proton

A

A main difference between gravitational and electric force is that electric forces A) attract B) repel or attract C) obey the inverse-square law D) act over shorter distances E) are weaker

B

A semiconductor can be A) a conductor B) an insulator C) both of these D) neither of these

B

Before a thunderstorm, clouds in the sky likely become A) conducting B) polarized C) grounded D) a field-free region

B

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

B

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

B

Insulating materials are composed of atoms with A) weak cohesive forces B) tightly bound outer electrons C) excess protons D) vastly more charge than conductors

B

The unit of electrical charge the coulomb, is the charge on a A) single electron B) specific large number of electrons C) neutron D) specific number of electrons E) quark

B

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

B

Two protons attract each other gravitationally and repel each other electrically, the greater of these forces is A) gravitation B) electrical C) neither of these

B

A balloon will stick to a wooden wall if the balloon is charged A) negatively B) positively C) either of these D) neither of these

C

A common naturally-polarized bit of matter is A) an electron B) a hydrogen atom C) a water molecule D) all of the above E) none of the above

C

A fundamental rule of electricity is that A) like kinds charges repel B) unlike kinds of charged attract C) both of these D) neither of these

C

A transistor is an example of a A) resistor B) superconductor C) semiconductor D) dry cell E) transmitter

C

Charge carriers in a metal are electrons rather than protons because electrons are A) negative B) smaller) C) loosely bound D) none of the above

C

Just as "gravity" is the study of a wide range of gravitational interactions, "electricity" is the study of a wide range of A) electrical charges B) electrical forces C) electrical interactions D) none of the above

C

Particle A has twice the charge of nearby particle B. Compared to the force on particle A, the force on particle B is A) half as much B) the same C) twice as much D) four times as much E) none of the above

C

Superconductors are noted for their A) high electric resistance B) low electric resistance C) absence of electric resistance D) low cost E) bright colors

C

The electrical force between electrical charges depends only on their A) magnitude B) separation distance C) both of these D) neither of thse

C

The force that binds atoms together to form molecules is A) gravitational B) nuclear C) electrical D) centripetal E) none of the above

C

The fundamental force underlying all chemical reactions is A) gravitational B) nuclear C) centripetal D) electrical E) none of the above

C

Two charges are separated by one meter exert 1 - N forces on each other. If the charges are pushed together so the separation is 25 centimeters, the froce on each charge will be A) 1 N B) 2 N C) 4 N D) 8 N E) 16 N

C

It is said that electric charge is conserved which means that electric charge A) may occur in an infinite variety of quantities B) is a whole number multiple of the charge of one electron C) will interact with neighboring electric charged D) can be neither created nor destroyed E) is sometimes negative

D

To say that electric charge is conserved means that no case has ever been found where A) the total charge on an object has changed B) quantity of negative charge on an object exactly balances positive charge C) the total quantity of charge on an object has increased D) net charge has been created or destroyed E) none of the above

D

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 A) 1 N B) 2 N C) 4 N D) 8 N E) none of the above

D

When the distance between two charges is halved, the electrical force between them is A) reduced by 1/4 B) halved C) doubled D) quadrupled E) none of the above

D

A conductor differs from an insulator in that a conductor has more A) electrons than protons B) protons than electrons C) energy than an insulator D) faster moving molecules E) none of the above

E