1142 Definitions

Question 1

The first sustained electric current from a chemical reaction was generated by ________

Answer 1

an Italian physicist named Alessandro Volta

Question 2

The positive terminal of a voltaic cell is called the _____

Answer 2

anode

Question 3

The negative terminal of a voltaic cell is called the _____

Answer 3

cathode

Question 4

8 page F

Answer 4

.

Question 5

equivalent mass of an element

Answer 5

atomic mass/valence

Question 6

alternating current made to go in one direction

Answer 6

rectified current

Question 7

current and voltage

Answer 7

directly proportional

Question 8

emission and behavior of electrons in vacuum tubes and semiconductor devices

Answer 8

electronics

Question 9

electronic device with electrodes

Answer 9

vacuum tube

Question 10

crystal with unbonded elecctrons

Answer 10

n-type semiconductor

Question 11

vacuum tube containing a filament and plate

Answer 11

diode

Question 12

destructive interaction between a current and the magnetic field it produces

Answer 12

self-induction

Question 13

are due to eddy currents

Answer 13

induction heating

Question 14

Two purposes for which direct current is required and alternating current is unsuitable

Answer 14

electroplating

recharging a battery

Question 15

The root-mean-square voltage of household current in the U.S.

Answer 15

115 volts

Question 16

Lenz’s law

Answer 16

A current induced by electromotive force always acts to oppose those forces

Question 17

The basic building blocks of electronic circuits

Answer 17

resistors
capacitors
diodes
triodes
transistors

Question 18

The release of electrons from a heated metal surface

Answer 18

thermionic emission

Question 19

invented by John Ambrose Fleming

Answer 19

the diode

Question 20

Part one of a transistor

Answer 20

emitter which supplies electrons and acts as a filament

Question 21

Part two of a transistor

Answer 21

base which is the center layer of the transistor and acts as the grid

Question 22

Part three of a transistor

Answer 22

collector which accepts electrons and acts as the plate

Question 23

The first radio broadcast of voice and music

Answer 23

a violin solo of “O Holy Night” and a Bible reading

Question 24

maximum current and voltage in a circuit

Answer 24

divide by .707

Question 25

average voltage and current in the circuit

Answer 25

multiply by .707

Question 26

invented the diode

Answer 26

John Fleming

Question 27

preferred alternating current for commercial use

Answer 27

George Westinghouse

Question 28

first discovered two laws of electrolysis

Answer 28

Michael Faraday

Question 29

discovered the voltaic cell; made the first battery

Answer 29

Alessandro Volta

Question 30

discovered that electrolysis could free metals from their ores

Answer 30

Humphrey Davy

Question 31

discovered electromagnetic induction at the same time as Michael Faraday

Answer 31

Joseph Henry

Question 32

preferred direct current for his experiments

Answer 32

Thomas Edison

Question 33

discovered induced currents that oppose electromagnetic forces

Answer 33

Heinrich Lenz

Question 34

established a radio station

Answer 34

Lee De Forest

Question 35

invented the transistor

Answer 35

William Shockley