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Physical Science > Ch. 10 > Flashcards

Ch. 10 Flashcards

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0
Q

Two objects will attract each other electrically only if

A

One is positive and one is negative

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1
Q

Which of the following could not happen when two charged objects touch each other?

A

Several seconds pass and then the objects fly apart

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2
Q

An electrical charge is usually produced by the removed or addition of

A

Electrons

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3
Q

Lines of force represent election fields through their

A

Direction

Closeness

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4
Q

Charging an object without actually adding or removing electrons is called

A

Electrical induction

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5
Q

A mechanical electro scope cannot detect

A

A small charge

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6
Q

Which of the following is a conductor?

A

Gold

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7
Q

Which of the falling is a insulator?

A

Rubber

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8
Q

Capacitors contain

A

Insulators only

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9
Q

What part of a circuit is designed to turn electricity into another form of energy

A

Electrical load

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10
Q

Conventional current

A

Is the opposite the flow of electrons in a conductor

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11
Q

The unit for potential difference is

A

Volt

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12
Q

Which part of a circuit in a home is designed to be replaced if it stops a circuit overload?

A

Fuse

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13
Q

What is the major difference between static and current electricity?

A

Static is stationary electricity

Current is moving electricity

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14
Q

What force causes the leaves in an electroscope to repel each other?

A

Electrostatic force

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15
Q

What is the SI unit for electrical charge?

A

Coulomb

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16
Q

What is the net charge of a dipole?

A

Zero

17
Q

Descibe how materials are classified in terms of conductivity

A

Conductors
Insulators
Semiconductors

18
Q

Why does lightening flow through a lightening rod instead of the building it is mounted on?

A

The wire to the ground is a better conductor than the building itself.

19
Q

Give two practical applications of static electricity

A

Photo copier

Electrostatic precipitator

20
Q

Describe the movement of electrons through a circuit

A

Negative to positive

21
Q

What is the difference between how a batter and a generator work?

A

Batteries are limited sources of electrons. Generators are machines that use the special relationship between electrical and magnetic energy to move electrons through conductors.

22
Q

How does a photovoltaic cell work?

A

?

23
Q

If a lamp in your house no longer works, and you notice that is has frayed wire, then it probably has developed what?

A

Short circuit

24
Q

Neutrons do not contribute to electrical charge.

A

True

25
Q

Most obstacles have an equal number of protons and electrons.

A

True

26
Q

Lines of electrical force indicate the direction an electron travels if subjected to the field represented.

A

False

27
Q

Electrical induction does not produce a charged object.

A

True

28
Q

Static cling is worse in the summer than in winter because summer air is moister and contains more ions.

A

False

29
Q

An electroscope’s leaves separate because they have opposite charges.

A

False

30
Q

Lightening is an example of an electrical discharge.

A

True

31
Q

Current can run through only solids, such as electrical wires.

A

False

32
Q

Direct current is the primary energy source is portable electronic devices.

A

True

33
Q

A light switch is an example of an electrical switch.

A

True

34
Q

Photovoltaic cells and electrochemical cells convert the same type of energy to electricity.

A

False

35
Q

If a Christmas light strand has one built break and all the bulbs go dark, it is most likely wired in a series circuit.

A

True

36
Q

The ideal circuit arrangement for a household would be a series circuit.

A

False

37
Q

What summarizes that like charges repel and unlike charges attract?

A

Law of charges

38
Q

What consists of one or more electrochemical cells that supply electrons released by a chemical reaction?

A

Battery

39
Q

What instrument detects the presence of charges?

A

Electroscopes

40
Q

What are modern charge-storage devices called?

A

Capacitor

41
Q

What is a special device that changes the voltage within portions of a circuit?

A

Resistor

Physical Science (4 decks)

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