basic physics

Question 1

of the following types of electromagnetic energy, which has the shortest wavelength?

Answer 1

Diagnostic rays

Question 2

which of the following are accurate statements regarding the characteristics of x-rays ?

Answer 2

1.they are highly penetrating and invisible
3. they travel in straight lines at the speed of light

Question 3

the term for a continuous path for the flow of electrical charges from the power source through one or more electrical devices and back to the source is :

Answer 3

Electrical circuit

Question 4

The smallest possible unit of electromagnetic energy is the

Answer 4

photon

Question 5

The common unit of measure for the potential difference across an x-ray tube is the :

Answer 5

VOLT

Question 6

the frequency of alternating current (AC) delivered by electric utilities in the united states and Canada is

Answer 6

60 HERTZ

Question 7

The purpose of transformer is to :

Answer 7

increase or decrease voltage

Question 8

which electron shell in the atom is most important for the production of x-rays?

Answer 8

K shell

Question 9

Electrons are held in place around the nucleus of the atom by an

Answer 9

binding energy

Question 10

when an atom gains or loses an electron it is called

Answer 10

ion

Question 11

the process of converting AC to DC is called

Answer 11

Rectification

Question 12

one of the most important elements in radiology that is used to create x-rays Is

Answer 12

tungsten

Question 13

x-rays cause ionization in the human body this has a negative effect on the body .

Answer 13

TRUE

Question 14

if a transformer has 100 turns on the primary side and 25 turns on the secondary side, it is a step down transformer

Answer 14

TRUE

Question 15

A Transformer with 500: 1 ratio would be a
step-up transformer.

Answer 15

True

Question 16

x-rays can cause cancer.

Answer 16

true

Question 17

how does wavelength affect the usefulness of an x-ray beam ? the shorter the wavelength the more penetrating the beam

Question 18

six characteristics of x-rays

Answer 18

1. have no mass
2. are highly penetrating and invisible
3. Are electrically neutral
4. Are polyenergetic and heterogeneous
5. travel in straight lines at the speed of light , can ionize matter.
6. produce biologic changes in tissues produce secondary and scatter radiation.

Question 19

current : amperes (A)
potential difference : VOLTS (v)
Electrical resistance : ohms

Answer 19

convert 40000volts to kilovolts ; 40 kvp
0.5 amperes to milliamperes : 500 mA

Question 20

what is the duration of an electrical cycle in the united states? An electrical impulse?

Answer 20

Electrical cycle= 1/60 sec
electrical impulse = 1/120 sec

Question 21

what is the primary purpose of a Transformer

Answer 21

to change the voltage

Question 21

Electromagnetic induction

Answer 21

the process by which an electric current in one circuit influences a current to flow in a second circuit.

Question 22

ammeter

Answer 22

measures electrical current

Question 23

VOLT meter

Answer 23

measures electrical potential

Question 24

Alternating current

Answer 24

current changes polarity from negative to positive at regular intervals

Question 25

kilovolt = equal to 1000 VOLTS

Answer 25

1000 volts

Question 26

rectification

Answer 26

process of changing AC to DC

Question 27

Ampere (A)

Answer 27

unit to measure the rate of current flow in a circuit

Question 28

mA milliampere

Answer 28

equal to 0.001 A ( 1/1000 A)

Question 29

VOLT

Answer 29

unit to measure potential difference

Question 30

current

Answer 30

quantity of electrons flowing in a circuit

Question 31

what is the device that produces the high voltage need for x -ray production

Answer 31

transformer

Question 32

when an electrical current uses its magnetic field to create a secondary current , this process is called

Answer 32

electromagnetic induction

Question 33

step up transformer

Answer 33

500 primary side and 1 in the secondary side