Transcript Electrostatics Jeopardy - Ms. Glinke
Where is the love?
Electrostatics
Did you say Adam?
“Don’t Taze Me Bro!” Coulomb is cool
Charge This
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©Norman Herr, 2003
A-100
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QUESTION: How do two electrons act when they are close to one another? ANSWER: They repel (like charges repel)
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A-200
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QUESTION: Two balloons are hanging apart when you come into class, what is the charge of each balloon?
ANSWER: negative They must be the same charge, either both positive or both
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A-300
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QUESTION: What happens to the electrons and protons when a balloon sticks to the wall?
ANSWER: Since the balloon is negative, all the positive protons will align closest to the balloon and all the electrons will arrange themselves furthest away
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A-400
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QUESTION: An object that has an excess number of protons is said to have a ___________ charge. ANSWER: Positive
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A-500
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QUESTION:
Balloons X , Y and Z are suspended from strings as shown at the top. Negatively charged balloon X attracts balloon Y and balloon Y attracts balloon Z. Balloon Z is ___
ANSWER: negative, neutral, or positive
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B-100
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QUESTION: What three subatomic particles make up an atom? ANSWER: Proton, neutron, and electron
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B-200
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QUESTION: What charge is an object with excess electrons? ANSWER: negative
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B-300
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QUESTION: What is the electrical charge when there are an equal number of protons to electrons in an atom?
ANSWER: Neutral
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B-400
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QUESTION: What scientist discovered that electrons surround the nucleus? ANSWER: Bohr
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B-500
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QUESTION: Which subatomic particle has the least mass? ANSWER: Electron, 9.11x10
-31
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C-100
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QUESTION: Which particle transfers to create static electricity? ANSWER: Electrons
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C-200
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QUESTION: ___________.
When rubbing your rubber-soled shoes on the carpet, most of the electrons transfer from __________ to ANSWER: The carpet to your shoes
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C-300
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QUESTION: How does the Van de Graaff generator work? ANSWER: …
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C-400
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QUESTION: together? If polyester has a higher electron affinity than wool, which one will have excess electrons when rubbed ANSWER: Polyester
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C-500
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QUESTION: Name one example of how we use static electricity commercially: ANSWER: Make-up, electrostatic spray paint, dusting products, photocopiers, hair products…ect
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D-100
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QUESTION: What unit is used to represent a charge? ANSWER: A Coulomb
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D-200
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QUESTION: Two electrons are .2m away, what is the force between them?
ANSWER: ….
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D-300
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QUESTION: charge? You have 5000 excess protons, what is the mass? What is the ANSWER: ….
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D-400
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QUESTION:
3.1x10
-7 Two ping pong balls have been painted with metallic paint and charged by contact with an Van de Graaff generator. The charge on the balls are C and -3.7x10
distance of 42 cm apart.
-7 C. Determine the force of electrical repulsion when held a
ANSWER:
5.8x10
-3 N Answer Question
D-500
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What happens to the size of the force between 2 charges when 1 of the charges doubles? Hint: use Coulomb’s Law
ANSWER: Force also doubles. They are directly related.
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E-100
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QUESTION: together? What charging process happens when two objects are rubbed ANSWER: Charging by Friction!!
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E-200
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QUESTION: electrons When a negative object touches a neutral object, the neutral object becomes _____ because it _____ ANSWER: negative, gains
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E-300
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QUESTION: When a negative object is grounded it now has a ________ charge. If you use your finger to ground the object, where do all the electrons go? ANSWER: the ground Neutral charge, the excess electrons transfer through your body to
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E-400
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QUESTION: How can you make a neutral object positive? ANSWER: Charging by conduction with a positive object
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E-500
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QUESTION: Explain how to charge a neutral object by induction ANSWER: and voila! 1. Hover a charged object over the neutral object 2. Ground the object 3. Take away the charged object
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FINAL JEOPARDY
You must answer both questions correctly to win!
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Question 1: with fur? Why does a rubber strip become negatively charged when rubbed
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