An electric field has
a. direction.
b. magnitude.
c. Both A and B
An electric field has
a. direction.
b. magnitude.
c. Both A and B
Suppose a hollow metal sphere
has a large negative charge on
it. The electric field strength
inside the sphere is
a.
b.
c.
d.
e.
large and positive.
zero.
weak and negative.
weak and positive.
large and negative.
Suppose a hollow metal sphere
has a large negative charge on
it. The electric field strength
inside the sphere is
a.
b.
c.
d.
e.
large and positive.
zero.
weak and negative.
weak and positive.
large and negative.
Electrical forces between
charges are strongest when the
charges are
a. far apart.
b. close together.
c. The electrical force is
constant everywhere.
Electrical forces between
charges are strongest when the
charges are
a. far apart.
b. close together.
c. The electrical force is
constant everywhere.
A difference between electrical
forces and gravitational forces
is that electrical forces include
a.
b.
c.
d.
e.
infinite range.
repulsive interactions.
the inverse square law.
separation distance.
none of the above
A difference between electrical
forces and gravitational forces
is that electrical forces include
a.
b.
c.
d.
e.
infinite range.
repulsive interactions.
the inverse square law.
separation distance.
none of the above
Two charged particles held
close to each other are
released. As they move, the
force on each particle
increases. Therefore, the
particles have
a. opposite signs.
b. the same sign.
c. charges that cannot be
determined
Two charged particles held
close to each other are
released. As they move, the
force on each particle
increases. Therefore, the
particles have
a. opposite signs.
b. the same sign.
c. charges that cannot be
determined
A positive charge and a
negative charge held near
each other are released. As
they move, the force on each
particle
a.
b.
c.
increases.
stays the same.
decreases.
A positive charge and a
negative charge held near
each other are released. As
they move, the force on each
particle
a.
b.
c.
increases.
stays the same.
decreases.
The SI unit of charge is the
a.
b.
c.
d.
e.
ohm.
joule.
coulomb.
ampere.
newton.
The SI unit of charge is the
a.
b.
c.
d.
e.
ohm.
joule.
coulomb.
ampere.
newton.
In a good insulator, electrons
are usually
a. not moving at all.
b. free to move around after
an impurity has been added.
c. free to move around.
d. tightly bound in place.
e. semi-free to move
around.
In a good insulator, electrons
are usually
a. not moving at all.
b. free to move around after
an impurity has been added.
c. free to move around.
d. tightly bound in place.
e. semi-free to move
around.
Charge carriers in a metal are
electrons rather than protons,
because electrons are
a. relatively far from a
nucleus.
b. loosely bound.
c. lighter.
d. all of the above
e. none of the above
Charge carriers in a metal are
electrons rather than protons,
because electrons are
a. relatively far from a
nucleus.
b. loosely bound.
c. lighter.
d. all of the above
e. none of the above
To be safe in the unlikely case
of a lightning strike, it is best to
be inside a building framed
with
a.
b.
c.
steel.
wood.
either A or B.
To be safe in the unlikely case
of a lightning strike, it is best to
be inside a building framed
with
a.
b.
c.
steel.
wood.
either A or B.
Much electronic equipment
contains transistors and diodes
that are made from
semiconductors.
Semiconductors
a. can be very good
insulators.
b. can conduct electricity.
c. contain helpful impurities.
d. all of the above
e. none of the above
Much electronic equipment
contains transistors and diodes
that are made from
semiconductors.
Semiconductors
a. can be very good
insulators.
b. can conduct electricity.
c. contain helpful impurities.
d. all of the above
e. none of the above
If you comb your hair and the
comb becomes positively
charged, your hair becomes
a.
b.
c.
uncharged.
positively charged.
negatively charged.
If you comb your hair and the
comb becomes positively
charged, your hair becomes
a.
b.
c.
uncharged.
positively charged.
negatively charged.
Objects can be charged by
a.
b.
c.
d.
e.
induction.
friction.
touching.
all of the above
none of the above
Objects can be charged by
a.
b.
c.
d.
e.
induction.
friction.
touching.
all of the above
none of the above
Lightning bolts occur between
a.
b.
c.
clouds and the ground.
clouds.
both A and B.
Lightning bolts occur between
a.
b.
c.
clouds and the ground.
clouds.
both A and B.
When a charged cloud passes
overhead, the ground below is
charged by
a.
b.
c.
d.
induction.
polarization.
deduction.
electrification.
When a charged cloud passes
overhead, the ground below is
charged by
a.
b.
c.
d.
induction.
polarization.
deduction.
electrification.
A rubbed balloon will stick to a
wooden wall, which
demonstrates charge
a.
b.
c.
d.
transfer.
potential.
conservation.
polarization.
A rubbed balloon will stick to a
wooden wall, which
demonstrates charge
a.
b.
c.
d.
transfer.
potential.
conservation.
polarization.
Electrical polarization occurs when
a.
an electron is at a different
location than a proton.
b.
charge distribution in a
neutral molecule separates.
c.
the electron and the proton
are on different sides of an atom.
d.
an atom vibrates in a single
direction.
e.
none of the above
Electrical polarization occurs when
a.
an electron is at a different
location than a proton.
b.
charge distribution in a
neutral molecule separates.
c.
the electron and the proton
are on different sides of an atom.
d.
an atom vibrates in a single
direction.
e.
none of the above
The reason a charged balloon will
stick to a wall is that
a.
induced opposite charges in
the wall are closer than other wall
charges.
b.
the rubber of the balloon
simply sticks to walls.
c.
electrons transfer back and
forth between the wall and the
balloon.
d.
the charge is slightly sticky and
acts like glue.
e.
none of the above
The reason a charged balloon will
stick to a wall is that
a.
induced opposite charges in
the wall are closer than other wall
charges.
b.
the rubber of the balloon
simply sticks to walls.
c.
electrons transfer back and
forth between the wall and the
balloon.
d.
the charge is slightly sticky and
acts like glue.
e.
none of the above
The charge of an electron is
a. positive.
b. negative.
c. Electrons have no
charge.
The charge of an electron is
a. positive.
b. negative.
c. Electrons have no
charge.
Atomic nuclei of almost all
elements consist of
a.
b.
c.
d.
e.
only neutrons.
protons and electrons.
neutrons and electrons.
only protons.
protons and neutrons.
Atomic nuclei of almost all
elements consist of
a.
b.
c.
d.
e.
only neutrons.
protons and electrons.
neutrons and electrons.
only protons.
protons and neutrons.
Two like charges
a. neutralize each other.
b. repel each other.
c. must be neutrons.
d. attract each other.
e. have no effect on each
other.
Two like charges
a. neutralize each other.
b. repel each other.
c. must be neutrons.
d. attract each other.
e. have no effect on each
other.
Protons and electrons
a.
b.
c.
attract each other.
repel each other.
do not interact.
Protons and electrons
a.
b.
c.
attract each other.
repel each other.
do not interact.
The net charge of a nonionized
atom
a. depends only on the
number of electrons it has.
b. is zero.
c. usually cannot be
determined.
d. depends only on the
number of protons it has.
The net charge of a nonionized
atom
a. depends only on the
number of electrons it has.
b. is zero.
c. usually cannot be
determined.
d. depends only on the
number of protons it has.
A positive ion has
a. more electrons than
protons.
b. more protons than
electrons.
c. a +1 charge always.
d. one proton.
A positive ion has
a. more electrons than
protons.
b. more protons than
electrons.
c. a +1 charge always.
d. one proton.
Conservation of charge means that
a.
the total amount of charge in
the universe is constant.
b.
no experimenter has ever
seen a single charge destroyed by
itself.
c.
electrons by themselves can
be neither created nor destroyed.
d.
charge can be neither created
nor destroyed.
e.
all of the above
Conservation of charge means that
a.
the total amount of charge in
the universe is constant.
b.
no experimenter has ever
seen a single charge destroyed by
itself.
c.
electrons by themselves can
be neither created nor destroyed.
d.
charge can be neither created
nor destroyed.
e.
all of the above
What is the difference between
an insulator and a conductor?
Which would you guess copper
is? Wood? Distilled water?
What are three ways an object
can become charged? Give a
definition of Each. Give
examples of each.
Wood
Distilled Water
Metal
Conductor, Insulator, Semi
Conductor