Flashcards in Chaper 4-Electricity Deck (64)

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31

## AKA Electric potential. Higher voltage-higher potential.

### EM

32

## Flow of electrons

### Electric current

33

## Matter through which electrons flow easily

### Conductors

34

## Matter that inhibits flow of electrons

### Insulators

35

## Most ____ are good conductors

###
Metals

Ex silver, gold, copper

36

## Glass, clay, rubber, plastic are all examples of _______

### Insulators

37

## Under some conditions behaves as an insulator and sometimes as a conductor

### Semiconductors

38

## property of limited resistance to electron flow below a critical temperature.

### Superconductivity

39

## Electrons flow on the ____ surface of a wire

### Outer

40

## When resistance is controlled and electrons flow over a crossed path

### Electric Circuit

41

## Length is _____ proportional to resistance

### Directly

42

## Measures number of electrons flowing in electric circuit

### Ampere/amp (A)

43

## Measures electric potential

### Volts

44

## Unit of electrical resistance

### Ohms

45

## Ohm's law ______

### V=IR

46

## All circuit elements are connected in a line along same conductor

### Series

47

## __1__ of voltage across each circuit element=__2__ circuit voltage

###
1. Sum

2. Total

48

## Has elements that bridge conductors rather than lie in a line along a conductor

### Parallel Circuit

49

## __1__ of all CURRENTS through each circuit element=total __2__ current

###
1. Sum

2. Circuit

50

## Does voltage change in a parallel circuit?

### NEVER

51

## _____ NEVER changes in a SERIES circuit

### Amperage

52

## DC=electrons flowing in _____ direction(s) along a conductor

### One

53

## AC=current in which electrons ______ back an forth

### Oscillate

54

## Horizontal or X-axis of waveform represents __1__. Vertical or y-axis represents __2__ of current

###
1. Time

2. Amplitude

55

## For DC, electrons always flow in the same __1__ with same velocity, so DC is represented by a __2__ line.

###
1. Direction

2. Horizontal

56

## _____ separation between line and time axis represents magnitude of current

### VERTICAL

57

## Are series elements interdependent or independent

### Interdependent

58

## Parallel elements are _____

### Independent

59

## Waveform for AC is _____

### Sine curve

60