Quiz 6: Charging Objects

Negative charge is formed when there is an excess amount of

• Electrons
• Neutrons
• Protons

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Opposite charges ______ each other

• Attract
• Repel
• Do nothing

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An electron is near two opposite charged sheets of metal.  The electron is _____  the positive sheet and ____ the negative sheet.

• attracted to / repelled by
• attracted to / attracted to
• repelled by / attracted to
• repelled by / repelled by

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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

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Two like charges

•  neutralize each other.
• repel each other. 
• must be neutrons. 
• attract each other.

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Materials that allow electrons to flow freely across the entire surface are known as __________________.

• conductors

• insulators

When you brush your hair you scrape off electrons, and your hair

• becomes positively charged
• becomes negatively charged
• becomes positively and negatively charged
• remains uncharged, or neutral

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Use the following information to answer the question:

Object A is NEGATIVELY charged.

Object A and Object B attract.

Object B and Object C repel.

Object C and Object D attract.

What type of charge could Object D possess?

• ONLY Positive

• ONLY Negative

• Positive or Neutral

• Negative or Neutral

• Positive or Negative or Neutral

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NGSS.MS-PS2-5

Two electrically neutral metal spheres, A and B, on insulating stands are placed in contact with each other. A negatively charged rod is brought near, but does not touch the spheres, as shown in the diagram below. How are the spheres now charged?

• A is positive and B is positive.
• A is negative and B is positive.
• A is positive and B is negative.
• A is negative and B is negative.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5