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Radiology > Semester 2 Physics exam 1 > Flashcards

Semester 2 Physics exam 1 Flashcards

1
Q

Electric motor in which the rotor is a series of wires loops but the external magnetic field is supplied by several fixed electromagnets called stators

A

Induction motor

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2
Q

Voltage is increased from primary side to secondary

A

Step up transformer

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3
Q

Process of converting AC to DC

A

Rectification

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4
Q

Located in operating consul controls KVP consists of one winding of wire and varies voltage and current by self induction

A

Auto transformer

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5
Q

Rate of change of an objects position over time (speed)

A

Velocity

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6
Q

Number of cycles or wavelengths of a simple harmonic motion per unit time expressed in hertz

A

Frequency

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7
Q

Distance between similar points on a sine wave the length of One cycle

A

Wavelength

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8
Q

Continuum of electromagnetic energy

A

Electromagnetic spectrum

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9
Q

Oscillating electric and magnetic fields travel in a vacuum with the velocity of light. includes x-rays Gamma Rays and non-ionizing radiation parentheses ultraviolet visible infrared radio waves

A

Electromagnetic radiation

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10
Q

Width of light wavelength

A

Amplitude

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11
Q

Material can serve as a conductor and as an insulator of electricity

A

Semiconductor

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12
Q

Determines radiation exposure during radiography

A

AEC

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13
Q

Emission of electrons from a heated surface

A

Thermionic emission

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14
Q

What are the three main components of the x-ray imaging system?

A

High voltage generator, operating console , x-ray tube

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15
Q

Allows flow in one direction only

A

Diode

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16
Q

What is matter?

A

anything that takes up space

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17
Q

What is mass?

A

Quantity amount of matter in an object

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18
Q

What is radiation?

A

Transfer of energy

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19
Q

What is an atom?

A

Building block of matter

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20
Q

The closer to the nucleus The shell is tighter the bond of electrons

A

Binding energy

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21
Q

What are the two types of ionizing radiation? And their subparticles

A

Particulate (alpha and beta) and electromagnetic (gamma and x-rays)

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22
Q

X-rays are useful because of

A

Low penetrability and low ionization

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23
Q

The shorter the wavelength the _____ the frequency

A

Higher

24
Q

Who developed the quantum theory and what is the formula?

A

Max Planck E =HF

25
Q

Bundle of energy

A

Quantum

26
Q

What is ohms law

A

Velocity equals amperes times resistance V=IR

27
Q

What percentage of the voltage ripple are wave in full wave?

A

100%

28
Q

What percentage of voltage ripple are 3 phase &6 pulse

A

14%

29
Q

What percentage of voltage ripple are 3 phase 12 pulse?

A

4%

30
Q

Percentage of voltage ripple for high frequency

A

1%

31
Q

In the electromagnetic spectrum cameras in x-rays are _____ energy

A

High

32
Q

In the electromagnetic spectrum radio frequency and microwaves are _____energy

A

Low

33
Q

Is bone radiopaque or radiolucent?

A

Radiopaque

34
Q

Are lung tissue and soft tissue radio Lucent or radiopaque?

A

Radiolucent

35
Q

The inverse square law may be applied when

A

Distance changes

36
Q

What occupies a small segment of the electromagnetic spectrum?

A

Visible light

37
Q

When compared with visible light x-rays have shorter

A

Wavelength

38
Q

What has the shortest wavelength?

A

Gamma rays

39
Q

______ _______ has greater penetrating ability

A

Electromagnetic radiation

40
Q

Flows in only One Direction

A

Direct current

41
Q

Electrons flow alternatively in opposite directions

A

Alternating current

42
Q

Has low energy and long wavelength

A

Radio frequencY

43
Q

demonstrated that electricity can be used to generate magnetic fields

A

Oersteds experiment

44
Q

To induce a current with use of a magnetic field the magnetic field can’t be constant must be changing

A

Faradays law

45
Q

Powers that rotating anode of x-ray tube

A

Induction motor

46
Q

A transformer operates only with a _____ Electric current . AC or DC?

A

Changing AC

47
Q

Measures voltage provided to the x-ray imaging system and adjust that voltage to 220 V

A

Line compensator

48
Q

Where is the lien compensator located

A

Operating consul

49
Q

What is the most accurate most sophisticated and complicated timer

A

Electronic

50
Q

Secondary voltage higher than primary

A

High frequency transformer

51
Q

Produces nearly constant potential voltage waveform improving image quality at lower patient dose

A

High frequency generator

52
Q

Outer shell of an Atom

A

Valance

53
Q

Alpha particles represent hi ionizing radiation with _____ range

A

Short

54
Q

Beta particles do not ionize so readily and have a blank range

A

Longer

55
Q

X-rays have a ______ ionization rate and a very _____ range

A

Low & long

Radiology (13 decks)

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