Electrostatics Quiz Review

When an object gains electrons it becomes __________

• Neutral

• Positively charged

• Negatively charged

An atom of oxygen has 8 protons and 10 electrons, this means the atom is ____________

• positively charged because it has excess electrons

• negatively charged because it has excess electrons

• positively charged because it has a deficiency of electrons

• negatively charged because it has a deficiency of 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

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.

When two objects are rubbed together, there is a transfer of electrons. How do you determine which object acquires the transferred electrons?

• Always transfer from the bigger to the smaller object, to make it even

• Transfer is based on the initial charge of the two objects

• Transfer is based on how much electron affinity that each object has

• Always transfer from the more negative to the more positive object

What is the end result of charging by contact?

• Both object have the same charge, so they will attract one another

• Both object have the same charge, so they will repel one another

• Both object have the opposite charge, so they will attract one another

• Both object have the opposite charge, so they will repel one another

What method of static charging is shown in this picture

• Contact

• Friction

• Grounding

• Electron Shifting

Which image shows a neutral conductive pith ball after a positively charged balloon is brought near the left side, but doesn't touch?

• A

• B

• C

• D

Why does the child's hair stick up?

• The boy is grounded since he's at the bottom of the slide

• He gained a charge from the slide, and since he's not grounded, his hairs have the same charge so they repel one another

• He gained a charge from the slide, and since he's not grounded, his hairs have opposite charges so they repel one another

• When hair is neutral, some have a positive side and some have negative side, so they will attract to each other, making it stand up

This image shows the before picture, when a balloon is rubbed with polyester. Identify the correct after picture.

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