chapter 20 review Flashcards

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1
Q

Two positive charges that come next to each other will ______ eachother.

A

repel

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2
Q

Two negative charges that come next to each other will ______ eachother.

A

repel

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3
Q

A positive and negative charge that come near each other will _____ each other

A

attract

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4
Q

what 3 things is each of the elements on the periodic table made of?

A

protons, electrons, and neutrons

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5
Q

protons have a ___ charge

A

positive

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6
Q

electrons have a ____ charge

A

negative

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7
Q

neutrons have _______

A

no charge

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8
Q

What is an electric force?

A

the attraction between electric charges

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9
Q

Why don’t you have to touch a charged object to feel the effects of the charged object?

A

It has an electric field

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10
Q

What is static electricity?

A

a stationary (does not move) electric charge

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11
Q

Charging by friction

A

feet rubbing against the ground

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12
Q

charging by conduction

A

electrons flowing from feet to body to hand

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13
Q

charging by induction

A

hand to door nob

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14
Q

what is an instrument that can detect an electric charge

A

electroscope

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15
Q

what is static discharge

A

the transfer of electric charges from one object to another.

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16
Q

What is an electric current

A

the continuous flow of electric charges through a material

17
Q

SI unit for electric current is

A

amp (A)

18
Q

what does an electric current require to flow?

A

an electric current

19
Q

_____ transfer energy well

A

conductors

20
Q

examples of conductors

A

aluminum, copper, silver

21
Q

______ do not conduct electricity well

A

insulators

22
Q

examples of insulators

A

rubber, plastic, glass

23
Q

The difference in electrical potential energy between two places in a circuit is called ____

A

voltage

24
Q

_____ causes a current in an electric current

A

voltage

25
Q

SI unit for voltage

A

volts (V)

26
Q

What is a voltage source

A

a device that creates potential difference in an electric current

27
Q

examples of voltage sources

A

batteries and generators

28
Q

What is resistance in an electrical circuit?

A

the measure of how different it is for charges to flow through a material

29
Q

What four things does resistance depend upon

A

material, length, diameter, temperature