Chapter 3&4

Question 1

X-rays produced when

Answer 1

extremely high energy electricity creates high speed electrons that interact with matter.

Question 2

What is produced when extremely high energy electricity creates high speed electrons that interact with matter.

Answer 2

X-rays are produced

Question 3

Body of matter from which electrons have been added or removed (ionization) causing a positive or negative charge

Answer 3

Electrified -

Question 4

Electricity is concerned with

Answer 4

Concerned with the distribution and movement of electrons

Question 5

Three ways to electrify a body

Answer 5

Electrification by Friction.
Electrification by Contact.
Electrification by Induction.

Question 6

quantity or number of electrons flowing; is measured in
Amperes (A)

Answer 6

Electric Current-

Question 7

Electric Current- is measured in

Answer 7

Amperes (A)

Question 8

the force in which electrons travel; is measured in Volts (V)

Answer 8

Electric Potential-

Question 9

Electric Potential- is measured in

Answer 9

Volts (V)

Question 10

; the number of x-ray photons in the primary beam

Answer 10

mA-quantity

Question 11

; the penetrating power of the X-ray beam

Answer 11

kV- quality

Question 12

When electrons move in the same direction

Answer 12

Direct current
(DC)-

Question 13

When electrons move in one direction and then reverse and move in the opposite direction

Answer 13

Alternating current
(AC)-

Question 14

Circuit diagram of X-ray machine:
Operating console has what selections

Answer 14

kVp selection
mA selection
Time selection

Question 15

Circuit diagram of X-ray machine:
Has what for their high voltage selection

Answer 15

Step-up transformer
Rectification
Circuit

Question 16

Circuit diagram of X-ray machine:
Has what for xray tube

Answer 16

X-ray tube
Filament circuit

Question 17

1. Source of
2. Energy is
3. Is created

Answer 17

1. Energy
2. Altered
3. X-ray

Question 18

Two coils are placed next to each other. A current will run through the first causing a similar current in the second.

Answer 18

Mutual Induction

Question 19

Mutual induction is found where

Answer 19

Step up and step down transformers

Question 20

Always present in coils supplied with alternating current

Answer 20

Self Induction

Question 21

Self induction is found where

Answer 21

Found in autotransformer, only has 1 winding

Question 22

What induction has has primary and secondary coils

Answer 22

Mutual induction

Question 23

What run an x-ray circuit

Answer 23

Generators

Question 24

What Device that converts mechanical energy to electrical energy.

Answer 24

Generators

Question 25

Generators Select and control what

Answer 25

kVp, mA and time.

Question 26

What Allows the operator to select the focal spot size appropriate for the examination.

Answer 26

Generator

Question 27

3 Evolution of Generators

Answer 27

Single phase power 3 phase power High frequency generators

Question 28

Voltage drop creates

Answer 28

low energy x-ray photons

Question 29

Low energy x-ray photons are absorbed into _ and increase _

Answer 29

tissue patient skin exposure

Question 30

Do Low energy x-ray photons contribute to the image or do not?

Answer 30

Do not

Question 31

In a transformer a step up is what selector

Answer 31

kVp selector

Question 32

In a transformer a step down is what selector

Answer 32

mA selector

Question 33

Facts about X-ray circuit 1. Transformers operate on 2. Transformers supply the x-ray tube with 3. X-ray tube cannot convert electric energy into X-ray energy with 4. 3. Electric energy needs to be converted __ before it reaches the X-ray tube

Answer 33

1. AC 2. altered 3. AC 4. From AC to DC

Question 34

Process of changing AC to DC

Answer 34

Rectification

Question 35

With rectification the electrons flow in what direction

Answer 35

Only one direction

Question 36

Inhibits flow of electrons

Answer 36

Resistor

Question 37

Provides electric potential

Answer 37

Battery

Question 38

Momentarily stores electric charge

Answer 38

Capacitor

Question 39

Increases or decreases voltage by fixed amount (AC only)

Answer 39

Transformers

Question 40

Allows electrons to flow in only one direction

Answer 40

Diode