Science 10.2-all 11

Question 1

the most important cause of magnetism in magnetic materials

Answer 1

electron spin

Question 2

produced by the motion of electrons and other charged particles

Answer 2

magnetic fields

Question 3

a group of aligned atoms having a single magnetic field

Answer 3

domain

Question 4

theory that explains why a magnet works

Answer 4

domain theory

Question 5

describes substances that have no unpaired electrons and are always slightly repelled by either pole of a magnet

Answer 5

diamagnetic

Question 6

describes substances that have only one unpaired electron and are weakly attracted to magnets

Answer 6

paramagnetic

Question 7

describes substances that have several unpaired electrons and are strongly attracted to magnets

Answer 7

ferromagnetic

Question 8

describes substances that can be quickly magnetized even in a weak magnetic field

Answer 8

magnetically soft

Question 9

magnet made from magnetically soft material

Answer 9

temporary magnet

Question 10

describes materials whose domains strongly resist changes in the direction of their magnetic fields

Answer 10

magnetically hard

Question 11

magnet made from magnetically hard material

Answer 11

permanent magnet

Question 12

magnetizing by stroking an object with a magnet

Answer 12

magnetizing by contact

Question 13

temporary magnetization caused by placing an object within a magnetic field

Answer 13

magnetizing by induction

Question 14

magnetizing caused around a wire by electricity flowing through a wire

Answer 14

magnetizing by electricity

Question 15

a device that produces a strong magnetic field when electricity passes through it

Answer 15

electromagnet

Question 16

the rule stating that if the thumb of the left hand is pointed along a wire (or other conductor) in the direction of electron current, the fingers encircle the conductor in the direction of the generated magnetic field

Answer 16

left-hand rule

Question 17

a magnetically soft material placed within the coils of an electromagnet in order to strengthen its field

Answer 17

core

Question 18

three ways to increase magnetism

Answer 18

add a core, increase current, add coils

Question 19

the temperature at which ferromagnetic material’s domains disappear

Answer 19

Curie point

Question 20

the resistance of a magnet to be demagnetized by a magnetic field

Answer 20

coercivity

Question 21

piece of magnetic material that you lay across the top of two magnets when they are stored

Answer 21

keeper

Question 22

force on an electric charge moving in a magnetic field that causes the charge to deviate from its original path

Answer 22

deflecting force

Question 23

a navigational device consisting of a magnet free to swing horizontally so that it always points north

Answer 23

magnetic compass

Question 24

was a British pioneer of electrostatics and discovered that a compass points north because it is guided by earth’s magnetic field

Answer 24

William Gilbert

Question 25

the book in which William Gilbert published his findings on magnetism

Answer 25

De Magnete

Question 26

the deviation of a compass needle from true north

Answer 26

angle of declination

Question 27

a line connecting points of equal declination

Answer 27

isogonic line

Question 28

a line connecting all points of 0 declination

Answer 28

agonic line

Question 29

the phenomenon in which a compass constructed with a magnet that swings vertically instead of horizontally points in the angle at which the lines of flux enter the earth

Answer 29

inclination

Question 30

a line connecting points of equal inclination

Answer 30

isoclinic line

Question 31

an isoclinic line where the angle of inclination is 0°

Answer 31

magnetic equator

Question 32

a device that produces static electricity

Answer 32

electrostatic generator

Question 33

a high-voltage electrostatic generator that is the most common type in use today

Answer 33

Van de Graaff generator

Question 34

Electric charge always moves to the _____ of the charged object

Answer 34

outside

Question 35

the large discharge of static electricity between the ground and a cloud during a thunderstorm

Answer 35

lightning

Question 36

a device that protects buildings and other structures from lightning strikes by directing the charge away from easily damaged building materials

Answer 36

lightning rod

Question 37

an eerie blue glow that appears around pointed objects during storms

Answer 37

St. Elmo's Fire

Question 38

is actually a natural electrostatic phenomenon called corona discharge

Answer 38

St. Elmo's Fire

Question 39

an early device that used a foil-lined jar to store electric charge

Answer 39

Leyden jar

Question 40

discovered the Leyden jar

Answer 40

Musschenbroek

Question 41

a device used to store a static electric charge

Answer 41

capacitor

Question 42

the method of reproducing images on paper using electrostatics

Answer 42

xerography

Question 43

the first electric light suitable for household use

Answer 43

incandescent lamp

Question 44

invented the incandescent lamp

Answer 44

Thomas Edison

Question 45

produces light by passing an electric current through a long tube filled with a low-pressure mixture of vapor and argon

Answer 45

fluorescent lamp

Question 46

replaced incandescent lamps; coiled tubes about the size of a regular incandescent bulb and operate the same way as the long tubes but can be used in sockets designed for incandescent bulbs

Answer 46

CFL (compact fluorescent lamp)

Question 47

electric discharge lamp filled with neon gas instead of mercury vapor

Answer 47

neon lamp

Question 48

semiconductor device that emit light when a direct electric current is applied

Answer 48

LED (light-emitting diode)

Question 49

True or False: Electricity can produce magnetism, and magnetism can produce electricity

Answer 49

True

Question 50

a device that converts electricity to back-and-forth motion

Answer 50

solenoid

Question 51

an American inventor, scientist, and artist best known for his invention of the telegraph

Answer 51

Samuel Morse

Question 52

a device for communicating over long distances by means of electromagnets that essentially consists of a switch (key), a long wire, and an electromagnet as the receiver

Answer 52

telegraph

Question 53

an electrical switch operated by an electromagnet

Answer 53

relay

Question 54

a device that converts pulses of electricity into sound waves

Answer 54

loudspeaker

Question 55

a device for converting electricity into motion

Answer 55

electric motor

Question 56

In DC, the ______ switches the current in the armature, allowing for continued repulsion of like poles

Answer 56

commutator

Question 57

a non-rechargeable electrochemical cell in which a chemical reaction produces electricity

Answer 57

voltaic cell

Question 58

the current-producing electrochemical cell that can be recharged with electricity from an outside current source

Answer 58

storage cell

Question 59

the electrode through which electrons exit an electrochemical cell; the negative terminal

Answer 59

anode

Question 60

the electrode through which electrons enter an electrochemical cell; the positive terminal

Answer 60

cathode

Question 61

one or more electrochemical cells connected to terminals as a single source of current

Answer 61

battery

Question 62

cells can be arranged in ____ to boost the voltage

Answer 62

series

Question 63

cells can be arranged in ____ to boost the current

Answer 63

parallel

Question 64

the ability of magnetism to convert mechanical motion into electric current

Answer 64

electromagnetic induction

Question 65

The strength of an electromagnetically induced current can be increased by:

Answer 65

1. faster motion 2. stronger magnetism 3. more coils

Question 66

a device that uses electromagnetic induction to produce electricity

Answer 66

generator

Question 67

A _(1)_ uses electricity to produce movement, whereas a _(2)_ uses movement to produce electricity

Answer 67

1. electric motor 2. generator

Question 68

a device in which a conducting fluid passes through a magnetic field at high speed to generate electricity

Answer 68

(magnetohydrodynamic) MHD generator

Question 69

a device that increases or decreases the voltage of alternating current using electromagnetic induction

Answer 69

transformer

Question 70

where is electric charge most concentrated?

Answer 70

at a point

Question 71

_____ made the production of electricity practical

Answer 71

generators

Question 72

just cause I'm curious to see how many people get frustrated at this card:

Answer 72

GOOD LUCK!!!!