APC Electrostatics (Forces & Fields)

Anika rubs a plastic rod with wool, and the rod gets a positive charge. What happens to the wool?

• acquires an equal positive charge

• acquires an equal negative charge

• acquires a smaller positive charge

• acquires a smaller negative charge

• remains neutral

Which of these could be the charge on an object?

• 0.40 mC

• 4.8 mC

• 5.0 C

• 6.5 C

• All of the above

Tags

NGSS.HS-PS2-4

A conducting sphere is charged with a negative charge -Q. Where will the charge be located on the sphere?

• Charge is concentrated at the center of the sphere

• Charge is concentrated at the bottom part of the sphere

• Charge is evenly distributed throughout the entire volume of the sphere

• Charge is evenly distributed on the surface of the sphere

• more information is required

Tags

NGSS.HS-PS2-4

An insulated sphere has a positive charge +Q. How is the charge distributed?

• Charge is concentrated at the center of the sphere

• Charge is concentrated at the bottom part of the sphere

• Charge is evenly distributed throughout the entire volume of the sphere

• Charge is evenly distributed on the surface of the sphere

• More information is required

A positively charged sphere is brought near end A of an uncharged metal bar. What will be the charges at ends A and B?

• positive, negative

• negative, positive

• positive, positive

• negative, negative

• neutral, neutral

Tags

NGSS.HS-PS3-5

A neutral electroscope is touched with a positively charged rod and then the rod is removed. Next, a negatively charged rod is brought close to the electroscope. What happens to the leaves?

• they move farther apart

• they move closer together

• they remain the same distance apart

• More information is required

Sophia brings a positive rod near an electroscope and the leaves move farther apart. David brings a negative rod near and the leaves come closer together. What type of charge is on the electroscope?

• positive

• negative

• neutral

• cannot be determined because the electroscope wasn't grounded

• Cannot be determined because the rods were not neutral

Two objects each have charge Q and are r units apart, attracting with a certain force. If both charges are doubled and the distance is halved, how much stronger is the force?

• 4 times greater

• 2 times greater

• 4 times less

• 16 times greater

• 16 times less

Tags

NGSS.HS-PS2-4

Two identical metal spheres are charged to +Q and -3Q and placed a distance r apart, experiencing an attractive force F. After touching and separating them, the new force is F'. Which is true?

• F = F'

• F' = 3F

• F' = F/3

• F' = 9F

• F' = F/9

Tags

NGSS.HS-PS2-4

An electric charge Q is at the origin. If the electric field at point A is E, what is the electric field at point B?

• 4E

• 2E

• E

• E/2

• E/4

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5