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Physics 201: General Physics II > Exam 2 > Flashcards

Exam 2 Flashcards

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1
Q

do you need motion to have voltage?

A

yes

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2
Q

do you need motion to have current?

A

no

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3
Q

what is flux?

A

the number of magnetic field lines through an area

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4
Q

induced current flows in a direction that _____ change in flux that caused it

A

opposes

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5
Q

magnetic field algorithm

A

1) is there a change in flux (is number of lines changing?)
2) is no, no induced emf
3) if yes,
more or less dots through an area, or more or less x’s through an area?
4) oppose the change
add dots (CCW)
add x’s (CW)

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6
Q

generators have an electrical _____ and mechanical _____

A

output
input

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7
Q

motors have an electrical _____ and mechanical _____

A

input
output

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8
Q

inductors can be changed by _____ and _____

A

geometry and composition

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9
Q

capacitors store _____ energy
inductors store _____ energy

A

electrical
magnetic

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10
Q

more turns = _____ voltage

A

higher

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11
Q

are resistors dependent on frequency?

A

no

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12
Q

do resistors use power?

A

yes

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13
Q

do inductors depend on frequency?

A

yes

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14
Q

is there more current or voltage in an inductor?

A

voltage leads current

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15
Q

do inductors use power?

A

no

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16
Q

do capacitors depend on frequency?

A

yes

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17
Q

is there more voltage or current in capacitors?

A

voltage lags current

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18
Q

do capacitors use power?

A

no

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19
Q

low frequency = _____ resistance

A

high

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20
Q

low resistance = _____ frequency

A

high

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21
Q

low resistance = _____ current

A

high

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22
Q

high resistance = _____ current

A

low

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23
Q

in an RL circuit, does light shin more at higher or lower frequency?

A

lower

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24
Q

capacitor shape

A

parallel lines

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25
Q

inductor shape

A

spiral lines

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26
Q

resistor shape

A

zig zags

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27
Q

RCL circuit algorithm

A

1) find R, Xc, and XL
2) use to find Z
3) use to find I

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28
Q

right hand rule for electromagnetic waves

A

palm = B
fingers = E
thumb = V

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29
Q

higher f = ______ energy

A

higher

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30
Q

lower energy = ____ frequency

A

lower

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31
Q

higher wavelength = _____ energy

A

lower

32
Q

higher energy = _____ wavelength

A

lower

33
Q

put the types of waves in order from longest to shortest wavelength

A

radio
microwave
infrared
visible
UV
x-ray
gamma

34
Q

rank the types of waves from highest to lowest frequency

A

gamma
x-ray
UV
visible
infrared
microwave
radio

35
Q

rank the types of waves from lowest to highest temperature

A

radio
microwave
infrared
viisble
UV
x-ray
gamma

36
Q

rank red, microwave, gamma, and violet from lowest to highest energy

A

microwave
red
violet
gamma

37
Q

the electromagnetic spectrum is expressed in terms of _____, _____, and _____

A

energy
wavelength
frequency

38
Q

electric energy ____ magnetic energy in a wave

A

=

39
Q

what change is needed for loop A and what direction?

A

add more dots
CCW

40
Q

what change is needed for loop B and what direction?

A

no change

41
Q

what change is needed for loop C and what direction?

A

add more x’s
CW

42
Q

which light bulb lights up at low frequency?

A

A

43
Q

which lightbulb lights up at high frequency?

A

B

44
Q

which has greater resistance in limit of low frequency?

A

LOOP 1:
2R
Loop 2:
R/2

45
Q

which has greater resistance in limit of high frequency?

A

Loop 1:
R/2
LOOP 2:
2R

46
Q

low frequency = no ______

A

capacitor

47
Q

high frequency = no _____

A

inductors

48
Q

what is the current when the frequency is high?

A
49
Q

what is current when the frequency is low?

A
50
Q

I =

A

current

51
Q

V =

A

voltage

52
Q

P =

A

power

53
Q

L =

A

resonance frequency?

54
Q
A
55
Q

what is the law of reflection>

A

angle of incidence = angle of reflection

56
Q

if the object is outside the focal point for a concave mirror then
do _____ f

A

> greater than

57
Q

if the object is outside the focal point for a concave mirror then the image orientation is _____

A

inverted

58
Q

if the object is outside the focal point for a concave mirror then it is a _____ image

A

real

59
Q

if the object is outside the focal point for a concave mirror then di is _____

A

positive

60
Q

if the object is outside the focal point for a concave mirror then magnification is _____

A

negative

61
Q

if an object is inside the focal point for a concave mirror then
do _____ f

A

<
less than

62
Q

if an object is inside the focal point for a concave mirror then the image orientation is _____

A

upright

63
Q

if an object is inside the focal point for a concave mirror then magnification is _____

A

positive

64
Q

if an object is inside the focal point for a concave mirror then it is a _____ image

A

virtual

65
Q

if an object is inside the focal point for a concave mirror then the image size is _____

A

larger

66
Q

if an object is inside the focal point for a concave mirror then the rays are _____

A

diverging

67
Q

if an object is reflected from a convex mirror then the rays are _____

A

diverging

68
Q

if an object is reflected from a convex mirror then the image orientation is _____

A

upright

69
Q

if an object is reflected from a convex mirror then magnification is _____

A

positive

70
Q

if an object is reflected from a convex mirror then it is a _____ image

A

virtual

71
Q

if an object is reflected from a convex mirror then di is _____

A

negative

72
Q

if an object is reflected from a convex mirror then the image size is _____

A

smaller

73
Q

an inverted image produced by a mirror is located 26cm in front of a mirror whose facial point is at 12cm.
what type of mirror?
where is image located?
what is the magnification?
what type of image?
enlarged or reduced?

A
74
Q

a mirror is placed 2.0cm from an object. the image is 5.6cm behind the mirror
what type of mirror?
what is the focal length?
what is the magnification?
what is the image orientation?

A
75
Q

an image is behind a convex mirror with radius R=68cm and placed 22cm from the mirror
where is the object?
what is the magnification?
what is the orientation?
what is the size?

A

Physics 201: General Physics II (7 decks)

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