Electrostatics

Which graph best represents the relationship between the magnitude of the electrostatic force and the distance between two oppositely charged particles?

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Tags

NGSS.HS-PS2-4

If the charge on each of two small charged metal spheres is doubled and the distance between the spheres remains fixed, the magnitude of the electric force between the spheres will be

• two times as great

• four times as great

• one-half as great

• the same

Tags

NGSS.HS-PS2-4

The centers of two metal spheres are separated by a distance of d. Each sphere has a charge of q. Which of the following combinations of charges would produce no change in the electrostatic force on the spheres?

• halving q on both spheres while leaving d as is

• halving q on one sphere while doubling d

• halving q on one sphere while halving d

• doubling q on both spheres while doubling d

Tags

NGSS.HS-PS2-4

If two identical charges repel each other with a force of 4.0 x 10-5 N at a distance of 0.05 m, what is the charge of each of the charges?

• 1.11x10-17 C

• 3.35x10-9 C

• 5753.6 C

• 287.7 C

Tags

NGSS.HS-PS2-4

Two point charges, initially at 3 cm apart, are moved to a distance of 12 cm apart. By what factor does the resulting electric force between them change?

• 4

• 16

• 1/4

• 1/16

Tags

NGSS.HS-PS2-4

In terms of conductors in electrostatic equilibrium, the electric field is always ___________ everywhere ___________ the conductor

• neutral; outside

• zero; inside

• negative; inside

• zero; outside

A bubble and a charged rod attract each other. This means their charges are ____________

• like

• opposite

• neutral

• not enough information

Tags

NGSS.HS-PS3-5

If a neutral object loses electrons, it now has a _________charge because electrons have a ______________charge.

• positive, positive

• positive, negative

• negative, positive

• neutral, negative

What does Coulomb's Law describe?

• The relationship between electric current and magnetic fields

• The force between two charges being directly proportional to the product of their charges and inversely proportional to the square of the distance between them

• The rate of flow of electric charge

• The resistance offered by a material to the flow of electric current

Tags

NGSS.HS-PS2-4

If the distance between two charges is halved, how does the force between them change according to Coulomb's Law?

• It is halved

• It is quartered

• It is doubled

• It increases by four times

Tags

NGSS.HS-PS2-4