Fall 2016 Final Flashcards Preview

Radiography > Fall 2016 Final > Flashcards

Flashcards in Fall 2016 Final Deck (102)
Loading flashcards...
31

Converts AC to DC

Rectifier

32

ElectroSTATics=study of _____ electric charges

STATionary

33

Way to electric an object:
1.
2.
3.

1. Contact
2. Friction
3. Induction

34

SCIO: Contact confers the __1__ charge; Induction confers the __2__ charge.

1. Same
2. Opposite

35

Only ____ charges move in a solid conductor

Negative

36

The earth is a ball of __1__. Ground potential=__2__

1. Electrons
2. 0

37

Sparks between loads and cloud/ground are _____

Lightening

38

______ is the undo mental unit electric charge

Coulomb

39

Laws of electrostatics:
1. ____ attract and ____ repel
2. _____ Law
3. Most charges reside on the ___ surface
4. Concentration of charge is greatest where _____ is greatest

1. Unlikes-----Likes
2. Coulomb's
3. External
4. Curvature

40

_____ is the unit of potential difference/electric potential

Volt

41

Unit of current

Ampere/Amp

42

Unit of resistance

Ohm

43

Study of moving electric charges

Electrodynamics

44

Allows flow of electricity

Conductors

45

Some example of conductors is

Gold, silver, and copper

46

Does NOT allow flow of electricity

Insulators

47

Examples of insulators are

Rubber, glass, plastic

48

Allows flow of electricity under certain conditions

Semiconductors

49

Example of semiconductors is

Silicon

50

Increased cross section of wire=_____ resistance (inversely proportional)

Decreased

51

Increased length of wire=_____ resistance (directly proportional)

Increased

52

Ohm's Law: Volts=__1__ X __2__ (__3__)

1. Amps
2. Resistance
3. V=IR

53

Geographic North Pole is the magnetic _____ pole

South

54

In a series circuit the __1__ never change. If one resistor goes out, they __2__.

1. Amps
2. All go out

55

1. Are series circuits independent or interdependent?
2. What about parallel?

1. Interdependent
2. Independent

56

Parallel Circuit=__1__ never change. If one goes out, __2__

1. Volts
2. They all don't go out

57

P=IV or __1__=__2__
POWER RULE

W=VA

58

Magnetic flux lines travel __1__ to __2__ in space and __3__ to __4__ inside the magnetic.

1. North
2. South
3. South
4. North

59

Natural magnets=_____

Earth

60

Artificial permanent magnets=__1__ or __2__ magnet

1. Horseshoe
2. Bar