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Physical Science > Chapter 11.2 > Flashcards

Chapter 11.2 Flashcards

1
Q

What was the first electric light suitable for household use?

A

Incandescent lamp

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2
Q

How does the incandescent lamp produce light?

A

By heating a thin piece of wire (filament) to a very high temperature

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3
Q

How does a fluorescent lamp produce light?

A

By passing an electric current through a long tube filled with gas.

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4
Q

What is a material that glows when exposed to radiation?

A

Phosphor

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5
Q

What are coiled tubes that can be used in sockets designed for incandescent bulbs?

A

Compact fluorescent lamps (CFLs)

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6
Q

What is an electric discharge lamp filled with neon gas instead of mercury vapor?

A

Neon lamp

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7
Q

What is a semiconductor devices that emit light when a direct electric current is applied?

A

Light-emitting diode (LED)

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8
Q

What is the most efficient method of lighting?

A

LED

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9
Q

What is a simple device that converts electricity to back-and-forth motion?

A

Solenoid

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10
Q

In order to make a rechargeable battery by using a solenoid, what should you use?

A

A strong magnet inside a wire coil

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11
Q

Who invented the telegraph?

A

Samuel F.B. Morse

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12
Q

What is a device used for communicating over long distances by means of electromagnets?

A

Telegraph

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13
Q

What is a special code of long and short clicks so that messages could be transmitted by telegraph?

A

Morse code

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14
Q

What is an electrical switch operated by an electromagnet?

A

Relay

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15
Q

What is a device that converts pulses of electricity into sound waves?

A

Loudspeaker

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16
Q

What is a device that converts sound waves into pulses of electricity?

A

Microphone

17
Q

If one speaker is wired backwards in a stereo system, how will it interfere with the sound produced by the correctly wired speaker?

A

Destructive interference

18
Q

What is the most important device for converting electricity into motion?

A

Electric motor

19
Q

What causes the rotation in an electric motor?

A

Oscillating magnetic field

20
Q

What is the electromagnet mounted on a shaft and free to rotate?

21
Q

What is the device attached to a DC electric motor’s shaft that reverses the current in the armature?

A

Commutator

22
Q

What type of current would you need to use for an electric car?

A

DC current

23
Q

What is the part of an AC motor that keeps the wires from twisting?

A

Slip rings

Physical Science (38 decks)

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