Electric fields and forces

Which force binds atoms together to form molecules?

• Gravitational

• Nuclear

• Electrical

• Centripetal

A positive ion has more

• electrons than neutrons.

• electrons than protons.

• protons than electrons.

• protons than neutrons.

• neutrons than protons.

To say that electric charge is quantized is to say 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.

The electrical force between charges is strongest when the charges are

• close together.

• far apart.

• The electric force is constant everywhere.

The electrical force between charges depends only on the charges'

• magnitude.

• separation distance.

• magnitude and separation distance.

Superconductors are noted for their

• high electric resistance.

• low electric resistance.

• absence of electric resistance.

• low cost.

• bright colors.

When the distance between two charges is halved, the electrical force between the charges

• quadruples

• doubles

• halves

• reduced to 1/4

Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is

• four times as much

• twice as much

• the same

• half as much

A proton is composed of

• 2 up quarks and 1 down quark

• 2 down quarks and 1 up quark

• 1 top quark and 2 bottom quarks

• 2 top quarks and 1 bottom quarks

A neutron is composed of

• 2 up quarks and 1 down quark

• 2 down quarks and 1 up quark

• 1 top quark and 2 bottom quarks

• 2 top quarks and 1 bottom quarks