According to Newton's third law of motion, what happens when one object exerts a force on another?

The second object exerts an equal force back on the first object.

Which statement BEST explains why electrons orbit the nucleus rather than the other way around?

The proton has much greater mass than the electron, so the electron accelerates more.

The nucleus has a larger charge.

How does gravitational force change when the distance between two objects is doubled?

The force becomes one-fourth as strong.

The force becomes one-half as strong.

The fundamental electric charge is considered “quantized” because ____________________.

charge comes in discrete, countable amounts

charge only exists in large quantities

The symbol "g" represents what in the equation F_g = mg?

the strength of the gravitational field created by the Earth

the gravitational force acting on the object

the force of the electric field

Which statement below BEST explains what happens to the electric field at the point exactly between two protons that are the same distance apart?

It cancels out and becomes zero.

If the proton between the two positively charged spheres is nudged slightly forward (away from both spheres), what happens?

It moves forward because the forward components of the forces add together.

It stays still because the forces still cancel out.

It slows down but remains between the spheres.

It oscillates back and forth between the spheres.

Which of the following is the most accurate definition of a "particle"?

the smallest unit of an element that retains its chemical properties

the center of an atom, containing protons and neutrons

a type of energy that flows between atoms

the way that atoms resemble the solar system

a fundamental piece of matter from which everything else is made

Which of the following BEST describes an electric dipole?

a pair of equal and opposite charges separated by a small distance

a single particle with a net positive charge

two particles with the same type of charge

a large group of randomly distributed positive and negative charges

a charge placed in the center of a conducting sphere

What does Gauss’s Law help us calculate?

the electric field flux through a closed surface

the total electric charge inside a surface

What is the permittivity of free space ε₀?

a constant related to electric forces in a vacuum

the amount of charge on an electron

the strength of the electric field

Which of the following BEST defines the kilogram?

a unit of mass equal to about the mass of one liter of water

the force required to accelerate one liter of water at 1 m/s²

the weight of a typical adult human

“Static electricity” between two objects occurs because

charges have been rubbed off one object onto the other

they have been electrically grounded

there is an electric current constantly flowing between them

their magnetic fields exert a force on each other

electromagnetic radiation passes from one to the other

What happens when you rub two different materials, like cotton and acrylic, together in a dryer?

One becomes positive, the other negative.

Both become negatively charged.

Which statement BEST explains why your hairs stand on end after touching the metal sphere of a Van de Graff generator?

The strands become negatively charged and repel each other.

Air pressure forces the hair apart.

The strands become positively charged and attract each other.

Which of the following allows the excess charge from your body to move when you touch a metal doorknob after walking on a rug?

The metal provides a path for the charge to leave your body.

The rug creates a magnetic field.

What does the example of hair rising due to static electricity illustrate about electric force?

It is the same strength as magnetic force.

A negatively-charged balloon would stick to a neutral wall because the

wall's atoms become polarized, creating a net attractive force

wall becomes positively charged when touched

balloon generates a magnetic field that holds it

wall absorbs the negative charge

wall creates friction that keeps the balloon in place

What happens to the electrons in the wall's atoms when a negatively charged balloon is nearby?

The electrons are pushed away from the balloon

The electrons move randomly within the atom.

The electrons remain fixed in place

The electrons become positively charged

The electrons leave the atom entirely

We get fewer static shocks on humid days because

water molecules in the air attract ions, reducing charge buildup

the air becomes more positively charged

the water molecules create a shield around you

humidity causes objects to lose all charge

Which feature of water molecules makes them good at collecting substances when washing?

They are naturally polarized due to their chemical bonds.

They are always negatively charged.

They have no electric charge at all.

They conduct electricity easily.

During a dry winter day, you build up 0.000002 C of negative charge by walking on a rug. When you touch a metal doorknob, what is most likely to happen?

You feel a small shock as the charge moves into the metal.

Nothing, because the charge stays on your body.

The doorknob gains a positive charge.

The charge makes the doorknob move.

The charge makes your hand feel cold.

Copper is commonly used in electrical wires because it ____________________.

is a good conductor because its outer electrons move freely

has no electrons in its outer shell

is an insulator that blocks electricity

If you add extra electrons to a metal sphere, where will these extra electrons end up?

evenly distributed on the sphere's surface

spread throughout the inside of the sphere

clustered at the center of the sphere

gathered at one corner of the sphere

concentrated at the bottom of the sphere due to gravity

A car struck by lightning protects the passengers inside mainly because the

metal frame acts as a Faraday cage with zero electric field inside

car's paint deflects the charge

steering wheel is made of plastic

Which statement BEST supports how a lightning rod works during a thunderstorm?

The pointed tip creates a high charge density that attracts lightning.

The flat metal surface disperses the charge.

The rod absorbs water and prevents lightning.

The rod's wooden base repels electric charge.

The rod blocks rain, which carries the lightning.

What happens to the electric field inside a charged conductor?

It becomes stronger at the center.

It circles around the outer edges.

Objects like microwave ovens or cars are able to protect their contents from electromagnetic radiation because

their metal structure acts as a Faraday cage

they use rubber seals to block radiation

A metal sphere is given a negative charge of 5 microcoulombs. Where will the added electrons move to minimize their repulsion?

spread out evenly on the surface

to a dense cluster at one point on the sphere

remain near the bottom of the sphere

stationary in the location where they were added

Two electrons are placed near each other in space. Which statement describes the forces between them?

They repel each other with a force much stronger than gravity.

They attract each other with a force stronger than gravity.

They repel each other with a force equal to gravity.

They attract each other with a force much stronger than gravity.

They feel no force because they have equal charge.

We do not feel strong electric forces from the objects around us in daily life because _________________

most objects are electrically neutral overall

electric forces do not exist in nature

all objects are positively charged

electric forces are weaker than gravitational forces

Science Prac. Test sec. 1

Authored by Dawn Nizzi

Science

12th Grade

NGSS covered

Used 1+ times

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60 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who first called the mysterious force produced by rubbing materials the “electric force”?

William Gilbert

Isaac Newton

Benjamin Franklin

Aristotle

Marie Curie

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the meaning of the Greek word “atom”?

invisible

indivisible

smallest piece

element

matter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to ancient Western thought, which of the following was NOT one of the four basic elements?

Hydrogen

Fire

Water

Air

Earth

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do we now know about the elements on the Periodic Table?

They are made of even smaller pieces.

They are the smallest possible particles in the universe.

They are made only of earth, air, fire, and water.

They are infinitely divisible.

They are indivisible and fundamental.

What did some ancient philosophers believe about dividing matter?

that you could keep cutting it into smaller pieces forever

that everything was made only of hydrogen and oxygen

that atoms were made of fire and water

that matter could not be divided at all

that all matter was made of feathers and paper

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Benjamin Franklin's experiments with the key and thunderstorm demonstrated which of the following?

that thunder is louder than lightning

that lightning is caused by protons

that static electricity can create rain

that lightning is an electrical phenomenon

that electricity cannot travel through metal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which particle plays no role in electricity because it has no electric charge?

proton

electron

neutron

photon

ion

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Science Prac. Test sec. 1

Who first called the mysterious force produced by rubbing materials the “electric force”?

What is the meaning of the Greek word “atom”?

According to ancient Western thought, which of the following was NOT one of the four basic elements?

What do we now know about the elements on the Periodic Table?

What did some ancient philosophers believe about dividing matter?

Benjamin Franklin's experiments with the key and thunderstorm demonstrated which of the following?

Which particle plays no role in electricity because it has no electric charge?

Which type of charge does an electron have?

According to Newton's third law of motion, what happens when one object exerts a force on another?

What is the mass of a typical adult human?

Access all questions and much more by creating a free account

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