Understanding Static Electricity and Electrostatic Fields

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.

• the silk has become negatively charged.

• protons have moved to the rod.

• glass attracts more protons.

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Objects that have opposite charges

• are attracted to each other, and the force between the objects pulls them together.

• are attracted to each other, and the force between the objects pushes them apart.

• are repelled by each other, and the force between the objects pulls them together.

• are repelled by each other, and the force between the objects pushes them apart.  

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If two objects with static charge are attracted, what do you know about them?

• They are both positively charged.

• They are both negatively charged.

• One is positively charged and one is negatively charged, but you won't be able to tell which is which.

• One is positively charged and one is negatively charged, and you can tell which is which by looking at them.

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Static electricity is 

• The balance of electrical charge on an object

• The unequal balance of electrical charges on an object

• The discharge of electrical charge

• The build up of protons in the nucleus of an atom 

If two charges repel each other, the two charges could be

• Positive and neutral

• Positive and negative

• positive and neutral

• negative and negative

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If an object has more positive than negative charges, its electrical charge is...

• positive

• negative

• neutral or no charge

• opposite

An electric FIELD is

• The area inside an electric fence

• The region around a charged object where the object’s electric force is exerted on other charged objects

• The same thing as electric force

• The neutral region in an area

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Walking across a carpet is an example of charge being transferred by

• friction.

• induction.

• contact.

What charge does an electron have?

• negative (-)

• positive (+)

• neutral or no charge (0)

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Electric charges that are alike _______ each other.

• Attract

• Repel (move away)