Electrostatic

Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be

• F

• 4F

• 2F

• F/4

Tags

NGSS.MS-PS2-3

A negatively charged plastic comb is brought close to, but does not touch, a small piece of paper. If the comb and the paper are attracted to each other, the charge on the paper

• must be positive

• must be negative

• may be neutral or negative

• may be neutral or positive 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following is a false statement about electrostatic force.

• Bringing charges closer together strengthen the force.

• The electrostatic constant remains the same.

• The values of the two charges is always the same.

• Electrostatic force can be attractive or repulsive

Tags

NGSS.HS-PS2-4

assume a rubber rod is rubbed against a rabbit fur and gains 5 electrons.  which of the following is true?

• The fur lost 5 electrons

• the fur gained 5 electrons

• the fur gained 5 protons

• The fur lost 2 electrons

After a balloon is rubbed against wool, the two objects will ________ each other because they have ___________ charges

• attract; like

• attract, opposite

• repel; like

• repel; opposite

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement is true of a positively charged object?

• Positively charged objects do not contain any electrons.

• Positively charged objects do not contain neutrons or electrons.

• There is a lack of electrons on a positively charged object.

• The protons and the electrons are both positively charged on such objects.

Examine the picture. What is true about it?

• Both objects are insulators

• Both objects are conductors

• Sphere is an insulator and person is a conductor

• Sphere is a conductor and person is an insulator

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly

• decreases;inversely

• increases;inversely

• increases;directly

Tags

NGSS.HS-PS2-4

Consider the conduction charging shown. 

• Electrons move from the insulating stand into the sphere.

• Protons move from the bar into the sphere.

• Electrons move from the charged metal bar into the sphere.

• Protons move from the sphere into the negatively charged bar.

Tags

NGSS.MS-PS2-3

A positively charged rod is held near the knob of a neutral electroscope. What best describes what will happen to the leaves?

• the leaves will spread apart and be positive

• the leaves will spread apart and be negative

• the leaves will stay closed and be positive

• the leaves will stay closed and be negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5