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- 1. Multiple Choice
When an object gains electrons it becomes __________
Neutral
Positively charged
Negatively charged
- 2. Multiple Choice
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
- 3. Multiple Choice
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
- 4. Multiple Choice
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.
- 5. Multiple Choice
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
- 6. Multiple Choice
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
- 7. Multiple Choice
What method of static charging is shown in this picture
Contact
Friction
Grounding
Electron Shifting
- 8. Multiple Choice
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
- 9. Multiple Choice
When a charged object contacts another object (one is usually a conductor), 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
- 10. Multiple Choice
Which electrostatics phenomena is shown in this picture?
Contact
Friction
Grounding
Electron Shifting
- 11. Multiple Choice
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
- 12. Multiple Choice
What is the end result of charging by friction?
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
- 13. Multiple Choice
Which image is NOT a conductor?
A
B
C
D
NONE of the above
- 14. Multiple Choice
After grounding, how will objects interact?
Both will have the same charge, so they attract one another
Both will be neutral, so they will attract one another
Botn will be neutral, so they will repel one another
Both will be neutral, so they will not attract nor repel
- 15. Multiple Choice
This image shows the before picture, when a balloon is rubbed with polyester. Identify the correct after picture.
- 16. Multiple Choice
A balloon is rubbed against a student's hair and then touched to a wall. The balloon sticks to the wall due to
The balloon is charged neutral, so is the wall, so it attracts to the wall
The balloon is charged opposite the wall, so it attracts to the wall
The balloon has a charge, so it attracts the neutral wall
The wall grounds the balloon, so it sticks
- 17. Multiple ChoiceWhen a plastic rod is rubbed with wool, the wool acquires a positive charge becauseprotons are transferred from the wool to the rodprotons are transferred from the rod to the woolelectrons are transferred from the rod to the woolelectrons are transferred from the wool to the rod
- 18. Multiple Choice
Grounding happens when...
A neutral object comes into contact with another neutral object
A charged object is rubbed against another charged object
A neutral object touches a MASSIVE conductive object
A charged object touches a MASSIVE conductive object
- 19. Multiple Choice
Examine Before and After picture. Why do electrons move the way they did?
This is grounding - electrons want to even out
This is charging by contact - electrons go to the larger object
This is charging by contact - electrons go from the object with less e- affinity to more e- affinity.
This is charging by contact - electrons want to even out
- 20. Multiple Choice
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
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