Physics Chapter 1 electrostatic

The SI unit of charge is

• the ampere
• the newton
• the coulomb
• the joule

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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The Electric force is most similar to what other fundamental force in the universe?

• Gravitational force

• Weak nuclear force

• Strong nuclear force

• The Force in Star Wars

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

In the diagram above, a positive test charge is located between two charged spheres, A and B. Sphere A has a charge of +2q and is located 0.2 meter from the test charge. Sphere B has a charge of -2q and is located 0.1 meter from the test charge. If the magnitude of the force on the test charge due to sphere A is F, what is the magnitude of the force on the test charge due to

sphere B?

The magnitude of the electrostatic force between two point charges is F. If the distance between the charges is doubled, the electrostatic force between the charges will become

• 4F

• 2F

Electrostatic force F exists between two point charges. If the

distance between the charges is tripled, the force between the charges will be

• 9F

• 3F

An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres?

• doubling q on both spheres while halving r

• doubling q on one sphere while halving r

• doubling q on both spheres while doubling r

• doubling q on one sphere while doubling r

The diagram above shows two negatively charged balloons

suspended from nonconducting strings being held by a student. What occurs as the student brings the balloons closer to each other without allowing them to touch?

• The magnitude of the electrostatic force between the balloons increases, and they attract each other.

• The magnitude of the electrostatic force between the balloons decreases, and they repel each other.

• The magnitude of the electrostatic force between the balloons increases, and they repel each other.

• The magnitude of the electrostatic force between the balloons decreases, and they attract each other.

The magnitude of electric potential is ______ at an infinite distance.

• 0

• negative infinity

• positive infinity

• 200