Chapter 11

Question 1

Who invented the first electrostatic generator?

Answer 1

Otto von Guericke

Question 2

What is a device that produces electricity?

Answer 2

electrostatic generator

Question 3

Who developed the Wimshurst machine?

Answer 3

James Wimshurst

Question 4

What is a machine which uses two rotating disks to increase a charge through induction?

Answer 4

Wimshurst machine

Question 5

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

Answer 5

Van de Graaff generator

Question 6

Where does the electric charge move to on the charged object?

Answer 6

to the outside of the charged object, never the inside

Question 7

Where is the charge more concentrated?

Answer 7

Wherever the contour is and comes to a point

Question 8

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

Answer 8

lighting

Question 9

What is a device that protects buildings and other structures from lighting strikes by directing the charge away from easily damaged materials?

Answer 9

lightning rod

Question 10

What is an eerie blue glow that appears around pointed objects during storms; is actually electrostatic phenomenon called corona discharge?

Answer 10

St. Elmo’s Fire

Question 11

What is an early device that used a foil-lines jar to store an electric charge?

Answer 11

Leyden jar

Question 12

What is a device used to store a static electric charge?

Answer 12

capacitor

Question 13

What is the method of reproducing images on paper using electrostatics?

Answer 13

xerography

Question 14

What uses friction from the passing air to obtain a negative charge?

Answer 14

electrostatic air filters

Question 15

What is an electric lamp that produces light by heating a thin wire called a filament to a high temperature?

Answer 15

incandescent lamp

Question 16

What is an electric discharge lamp that passes an electric current through a tube containing a low-pressure mixture of mercury vapor and argon to produce ultraviolet light, which is converted to visible light by a phosphor on the inner surface on the tube?

Answer 16

fluorescent lamp

Question 17

What is a fluorescent lamp that used a coiled tube to be about the size of a regular incandescent bulb and is designed to fit in sockets designed for incandescent bulbs?

Answer 17

compact fluorescent lamp

Question 18

What is an electric discharge lamp filled with neon gas?

Answer 18

neon lamp

Question 19

What is a semiconductor that emits visible light what a direct current is applied?

Answer 19

light-emitting diode (LED)

Question 20

What is a device that produces back-and-forth motion?

Answer 20

solenoid

Question 21

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

Answer 21

Samuel Morse

Question 22

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

Answer 22

telegraph

Question 22

What is an electrical switch operated by an electromagnet?

Answer 22

relay

Question 22

What is a device used for converting electricity into motion?

Answer 22

electric motor

Question 23

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

Answer 23

loudspeaker

Question 24

In which type of motor does the direction of the current in the armature each half-term cause the armature to rotate continuously?

Answer 24

DC motor

Question 25

What is the device in a DC motor that causes the rotation of the armature to be possible and allows for the continued repulsion of the poles?

Answer 25

commutator

Question 26

What is similar to a DC motor but does not need a commutator because alternating current already alternates direction?

Answer 26

AC motor

Question 27

In an AC motor, what is the commutator replaced by?

Answer 27

a simple pair of slip rings

Question 28

What is a non-rechargeable electrochemical cell in which a chemical rection produces electricity?

Answer 28

voltaic cell

Question 29

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

Answer 29

storage cell

Question 30

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

Answer 30

anode

Question 31

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

Answer 31

cathode

Question 32

What is one or more electrochemical cells connected to terminals as a single-source of current?

Answer 32

battery

Question 33

How must the cells be arranged in order to boost the voltage?

Answer 33

series

Question 34

How must the cells be arranged in order to boost the maximum available current?

Answer 34

parallel

Question 35

What type of motion can directly produce electric current by the magnetic force?

Answer 35

mechanical motion

Question 36

What is the ability of magnetism to convert mechanical motion into electric current?

Answer 36

electromagnetic current

Question 37

How can the strength of an electromagnetically induced current be increased?

Answer 37

- by increasing the number of turns in the coil -by moving the magnet faster -by increasing the strength of the magnet -by changing out the core

Question 38

What is a device that uses electromagnetic induction to produce electricity?

Answer 38

generator

Question 39

What is an AC generator extremely similar to?

Answer 39

an AC electric motor

Question 40

What is the primary difference between a motor and a generator?

Answer 40

a motor uses electricity to produce motion and a generator uses motion to produce electricity

Question 41

What is a device that detects and measures very small electric current?

Answer 41

galvanometer

Question 42

Who discovered that mechanical motion can directly produce electric current by the magnetic force?

Answer 42

Michael Faraday

Question 43

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

Answer 43

magnetohydrodynamic generator

Question 44

Does a generator create energy out of nowhere?

Answer 44

no

Question 45

How does a generator create energy if in does not create energy out of nowhere?

Answer 45

it converts motion into electrical energy

Question 46

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

Answer 46

transformer

Question 47

Who is credited with inventing a capacitor (Leyden jar)?

Answer 47

Musschenbroek