Electrostatics Review

A device used to observe electric forces is a(n):

• galvanometer

• compass

• electroscope

• voltmeter

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The unit of charge is the:

• ohm

• coulomb

• ampere

• volts

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The negatively charged particle in an atom is a(n)

• electron

• proton

• neutron

• nucleus

An object with equal amounts of positive and negative charge is called:

• positively charged

• negatively charged

• electrically charged

• neutral

Positive electric charges

• repel both positive and negative charges

• attract both positive charges and negative charges

• repel positive charges and attract negative charges

• attract positive charges and repel negative charges

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The buildup of static charge on an object is called ____ electricity.

• static

• inductive

• contact

• charged

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As the distance between two positively charged objects increases, the force between them

• increases

• decreases

• cannot be determined

• remains the same

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Materials that contain a small number of free electrons are called?

• semi-conductor

• insulator

• conductor

• superconductor

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Suppose you rub an inflated party balloon on a carpet, hold the balloon next to a wall, and discover that it “sticks” to the wall. Why did the balloon stick to the wall?

• The total charge on the balloon and wall
  becomes zero, so attraction between
  the two can occur

• The balloon gains electrons that are attracted to the positively charged particles on the wall

• Like charges on the balloon and wall cause an attraction between the two

• Balloons contain a special “atomic glue”
  that allows them to cling to other
  objects

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Rubbing a balloon on a person's head is an example of charging by _________________.

• friction

• induction

• convection

• conduction