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Test 2 Bishop 2nd year

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Quiz on Test 2 Bishop 2nd year, created by Analisa Olivarez on 03/10/2016.
Analisa Olivarez
Quiz by Analisa Olivarez, updated more than 1 year ago
Analisa Olivarez
Created by Analisa Olivarez about 8 years ago
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Resource summary

Question 1

Question
Which Scientist discovered that a magnetic field always surrounds a conductor in which an electric current is flowing?
Answer
  • Hans Oersted
  • Michael Faraday

Question 2

Question
The Magnetic Field will only exist around a wire while the electric current _________ flowing.
Answer
  • is
  • is not

Question 3

Question
No Electric Current = No Magnetic Field
Answer
  • True
  • False

Question 4

Question
The Magnetic Field collapses when the current is __________________.
Answer
  • terminated
  • flowing

Question 5

Question
If the switch is ____________, there will be no current.
Answer
  • open
  • closed

Question 6

Question
If the switch is _____________, there will be a current flowing.
Answer
  • closed
  • open

Question 7

Question
Magnetic Field lines form ______________ around the wire.
Answer
  • Circles
  • Extra lines

Question 8

Question
The closer to the wire, the _____________ the Magnetic Field.
Answer
  • stronger
  • weaker

Question 9

Question
If the wire is a loop, the Magnetic Field lines are concentrated (strongest) on the ____________ of the loop.
Answer
  • inside
  • outside

Question 10

Question
If you stack many loops together (coil) with an electric current flowing, the Magnetic Field ______________.
Answer
  • increases
  • decreases

Question 11

Question
A coil of wire with an electric current is a _______________.
Answer
  • Solenoid
  • Electromagnet
  • Ferromagnet
  • Step-up Transformer

Question 12

Question
The Magnetic Field can be intensified further by wrapping a coil of wire around a _________________ material.
Answer
  • ferromagnetic
  • diamagnetic
  • paramagnetic
  • non-magnetic

Question 13

Question
The majority of the magnetic field lines are ____________ the coil.
Answer
  • inside
  • outside

Question 14

Question
"The Magnetic Field can be intensified further by wrapping a coil of wire around a ferromagnetic material (iron)". This is considered _____________________.
Answer
  • Artificially
  • Naturally
  • Electromagnet

Question 15

Question
A(n) ________________ is a current-carrying coil of wire wrapped around an iron-core, which intensifies the Magnetic Field.
Answer
  • Natural Magnet
  • Artificial Magnet
  • Electromagnet
  • Solenoid

Question 16

Question
A Solenoid can be used as a remote control magnet.
Answer
  • True
  • False

Question 17

Question
In Radiography, a _______________ is used as a tube stand lock and bucky tray lock.
Answer
  • Solenoid
  • Stator
  • Rotor
  • Transformer

Question 18

Question
When you open and close a switch an electric current starts and ______________.
Answer
  • stops
  • continues

Question 19

Question
What did Faraday want to prove?
Answer
  • That Oersted's experiment was true.
  • The opposite of Oersted's experiment.

Question 20

Question
Faraday concluded that an electric current _________ be induced by the presence of a magnet.
Answer
  • can
  • cannot

Question 21

Question
When a magnet is in motion, the intensity changes, an electric current is ________________.
Answer
  • produced
  • absent

Question 22

Question
The changing of the Magnetic Field to produce an electric current is _______________________.
Answer
  • Electromagnetic Induction
  • Heat
  • Step-Up Transformer
  • Step-Down Transformer

Question 23

Question
Electromagnetic Induction is AKA ______________________ law.
Answer
  • Oersted's
  • Faraday's

Question 24

Question
The basis of Faraday's Law was that ____________ Magnetic Field intensity induces an electric current.
Answer
  • varying
  • constant

Question 25

Question
The magnitude of the induced current depends on four factors. The strength of the magnetic field is one of them.
Answer
  • True
  • False

Question 26

Question
Select the following factors that induce the magnitude of the current:
Answer
  • The strength of the magnetic field
  • The velocity of the magnetic field as it moves past the conductor
  • The angle of the conductor to the magnetic field
  • The number of turns in the conductor
  • The rotating speed of the Anode target
  • Direct Current
  • Alternating Current

Question 27

Question
Electric Motors and Generators are NOT good examples of Oersted's and Faraday's Laws.
Answer
  • True
  • False

Question 28

Question
In Radiography, an electric induction motor is used to _____________________.
Answer
  • Rotate the Anode target
  • Turn the Cathode
  • Neither

Question 29

Question
Within the Electric motor, what is considered the "Fixed Electromagnetic's"?
Answer
  • Stator
  • Rotor

Question 30

Question
The Electric Motor is a good example of __________________ Law(s).
Answer
  • Oersted's
  • Faraday's
  • Einstein's
  • Oersted's and Faraday's

Question 31

Question
Within the Electric Motor, what is considered "copper bars and iron core"?
Answer
  • stator
  • rotor

Question 32

Question
_______________________ is supplied to the AC induction motor.
Answer
  • Direct Current
  • Alternating Current

Question 33

Question
In an AC induction motor the EXTERNAL Magnetic Field is supplied by an _________ number of fixed electromagnets called a stator.
Answer
  • odd
  • even

Question 34

Question
A ___________ is placed inside this arrangement of stators as the armature.
Answer
  • Rotor
  • Electromagnet
  • Anode
  • Coil

Question 35

Question
The AC current supplying one opposite pair of coils is ___________ phase with the current supplying the next pair of coils.
Answer
  • out of
  • in

Question 36

Question
In the production of diagnostic x-rays, it is necessary to ______________ the incoming line voltage of 110 or 220 into the kilovoltage range.
Answer
  • increase
  • decrease

Question 37

Question
A transformer does convert one energy to another.
Answer
  • True
  • False

Question 38

Question
Electric Potential AKA ____________________.
Answer
  • Voltage
  • Current
  • Electromagnet
  • Flow of electrons

Question 39

Question
Current AKA ____________________.
Answer
  • Flow of electrons
  • Voltage
  • Electromagnet
  • Electric Potential

Question 40

Question
A Transformer transforms electric potential (voltage) and current (flow of electrons) into higher or lower intensity.
Answer
  • True
  • False

Question 41

Question
A transformer changes the intensity of alternating ________________ and _______________.
Answer
  • voltage, current
  • coils, voltage
  • current, coils
  • Primary coil, Secondary coil

Question 42

Question
Consider an electromagnet with a FERROMAGNETIC core bent around so that it forms a continuous loop.
Answer
  • Secondary Coil
  • Primary Coil

Question 43

Question
Transformers. There are no end surfaces from which the field lines can escape.
Answer
  • True
  • False

Question 44

Question
Transformers. The __________________ tends to be confined to the loop of the magnetic core material.
Answer
  • Magnetic Field
  • Anode
  • Cathode
  • Primary Coil

Question 45

Question
Another coil wound around the other side of the loop of core material.
Answer
  • Secondary Coil
  • Primary Coil

Question 46

Question
Will the Magnetic Field produced by the PRIMARY coil pass through the center of the SECONDARY coil?
Answer
  • Yes
  • No

Question 47

Question
A good _____________ is created between the magnetic field produced by the primary coil and the secondary coil.
Answer
  • coupling
  • current
  • voltage

Question 48

Question
The PRIMARY (input) coil is supplied with ____________________. *Establishing a magnetic field around the coil.
Answer
  • Alternating Current
  • Direct Current

Question 49

Question
Which coil is responsible for establishing a magnetic field around the coil?
Answer
  • Primary (input) coil
  • Secondary (output) coil

Question 50

Question
The Primary Magnetic Field will cut the __________________ coil and induce an Electromagnetic Field (EMF) and alternating current (AC).
Answer
  • Secondary (output)
  • Primary (input)

Question 51

Question
A changing current in the primary coil induces a changing current in the secondary coil.
Answer
  • True
  • False

Question 52

Question
A Transformer will operate only with changing current, ________________________.
Answer
  • Direct Current
  • Alternating Current

Question 53

Question
The transformer is used to change the magnitude of _____________ and current in an AC circuit.
Answer
  • voltage
  • primary coil (input)
  • secondary coil (output)
  • efficiency

Question 54

Question
The change in voltage is _____________ proportional to the ratio of number of turns (winding's) of the secondary coil (Ns) to the number of turns in the primary coil (Np).
Answer
  • Directly
  • Inversely

Question 55

Question
Voltage is induced in each of the turns of the _________________ coil.
Answer
  • Primary (input)
  • Secondary (output)

Question 56

Question
Turns Ratio:
Answer
  • Ns/Np
  • Np/Ns

Question 57

Question
Secondary coil turns are 10 times more than the Primary coil turns.
Answer
  • True
  • False

Question 58

Question
The turns ratio is part of the _________________ Law Formula.
Answer
  • Transformer
  • Faraday
  • Oersted
  • Einstein

Question 59

Question
What is the Transformer Law?
Answer
  • Vs/Vp = Ns/Np
  • Vp/Vs = Np/Ns
  • Vp/Vs = Ns/Np
  • Vs/Vp = Np/Ns

Question 60

Question
A step-up transformer ____________ the potential difference.
Answer
  • increases
  • decreases

Question 61

Question
A step-up transformer will have a turn ratio greater than ___________.
Answer
  • one
  • two
  • ten
  • five

Question 62

Question
Does a step-up transformer have more turns in the secondary coil or primary coil?
Answer
  • Secondary
  • Primary

Question 63

Question
Step-Up transformer: _________________ EMF (voltage)
Answer
  • Increases
  • Decreases

Question 64

Question
Step-Up transformer: ________________ current
Answer
  • Increases
  • Decreases

Question 65

Question
Step-Up transformer: _________________ is doubled, ______________ is halved.
Answer
  • Voltage, Current
  • Current, Voltage

Question 66

Question
A Step-Down transformer _________________ the potential difference.
Answer
  • increases
  • decreases

Question 67

Question
A Step-Down transformer will have a turn ratio of less than ___________.
Answer
  • one
  • two
  • ten
  • five

Question 68

Question
With the Step-Down transformer there are more turns in the __________________ coil than the _________________ coil.
Answer
  • Primary, Secondary
  • Secondary, Primary

Question 69

Question
Step-Down Transformer: ________________ EMF (voltage)
Answer
  • Decreases
  • Increases

Question 70

Question
Step-Down Transformer: __________________ current
Answer
  • Increases
  • Decreases

Question 71

Question
Step-Down Transformer: _____________________ is halved, _________________ doubles
Answer
  • Voltage, Current
  • Current, Voltage

Question 72

Question
In a Step-Up transformer, the current on the secondary side is ______________ than the current on the primary side.
Answer
  • larger
  • smaller

Question 73

Question
In a Step-Down transformer, the secondary current is _____________ than the primary current.
Answer
  • larger
  • smaller

Question 74

Question
According to ______________'s Law, Voltage and Current are inversely proportional.
Answer
  • Ohm
  • Faraday
  • Oersted
  • Einstein

Question 75

Question
The # of transformer turns and induced amperage must also be inversely proportional.
Answer
  • True
  • False

Question 76

Question
The Effect of Transformer Law on Current may be written as:
Answer
  • Is/Ip = Np/Ns
  • Ip/Is = Np/Ns
  • Ip/Is = Ns/Np
  • Is/Ip = Ns/Np

Question 77

Question
A _________________-core transformer consists of heavily insulated coils wound around a square or circular iron core.
Answer
  • Open
  • Closed

Question 78

Question
The ___________________ core is not a single piece but rather built up of laminated layers of iron.
Answer
  • Ferromagnetic
  • Diamagnetic
  • Non-magnetic
  • Paramagnetic

Question 79

Question
Laminated layers help reduce ______________ loses, resulting in greater efficiency.
Answer
  • energy
  • magnitude
  • current
  • voltage

Question 80

Question
An AUTO-TRANSFORMER consists of an iron core with ____________ winding wire around it.
Answer
  • one
  • two
  • five
  • ten

Question 81

Question
The single wire on the AUTO-TRANSFORMER acts as __________________.
Answer
  • both the primary and secondary winding.
  • the primary winding
  • the secondary winding
  • neither

Question 82

Question
Which transformer operates using self-induction?
Answer
  • Transformer
  • AutoTransformer

Question 83

Question
Autotransformer: Connections are made at ___________ points on the coil for both the primary and secondary sides.
Answer
  • same
  • different

Question 84

Question
Autotransformers are usually larger than regular transformers.
Answer
  • True
  • False

Question 85

Question
Autotransformers are generally used when a ___________ step-up or step-down in voltage is required.
Answer
  • small
  • large

Question 86

Question
A _______________ transformer consists of a laminated silicon steel core with two rectangular holes and a central section.
Answer
  • shell-type
  • regular
  • auto

Question 87

Question
The insulated coils on a Shell-Type transformer are wound around the ________________ section of the core.
Answer
  • central (center)
  • outside
  • top
  • bottom

Question 88

Question
Shell-Type Transformer: Insulated coils are wound around the central section of the core to __________ the distance magnetic flux has to travel between the two coils.
Answer
  • increase
  • reduce

Question 89

Question
A Shell-Type Transformer reduces the distance the magnetic flux has to travel and therefore decreases the leakage flux.
Answer
  • True
  • False

Question 90

Question
Which transformer is the most currently used type of transformer?
Answer
  • Shell-Type
  • Regular
  • Auto

Question 91

Question
Which transformer is more efficient?
Answer
  • Shell-type
  • Auto
  • Regular

Question 92

Question
The effectiveness of _____________ induction is increased with Shell-type Transformer.
Answer
  • Mutual
  • Self

Question 93

Question
Transformers: There is a normal ____________ loss of power in the secondary circuit from heat production that occurs due to resistance.
Answer
  • 5%-10%
  • 10%-50%
  • 1%-5%
  • 15%-20%

Question 94

Question
An AutoTransformer is considered a(n) _____________ selector.
Answer
  • kVp
  • mA
  • s

Question 95

Question
A Step-Up transformer is AKA a _________-Voltage Transformer.
Answer
  • High
  • Low

Question 96

Question
A Step-Down Transformer is AKA a(n) ______________ Transformer.
Answer
  • Filament
  • High

Question 97

Question
Which Transformer increases the tube voltage to kV?
Answer
  • Step-Up
  • Step-Down

Question 98

Question
Which Transformer decreases tube current to mA?
Answer
  • Step-Up
  • Step-Down

Question 99

Question
Which Transformer reduces voltage?
Answer
  • Step-Up
  • Step-Down

Question 100

Question
Which Transformer increases the filament amperage for thermionic emission?
Answer
  • Step-Up
  • Step-Down
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