chapter 3

Question 1

on and off push button

Answer 1

line switch; inside room

Question 2

measures the amount of current passing through the wires of the circuit

Answer 2

milliampere

Question 3

voltmeter measures the difference in current potential or voltage across an xray

Answer 3

kilovolt peak

Question 4

activates the xray production process

Answer 4

exposure button; outside room on panel

Question 5

flows continuously in one direction

Answer 5

direct current

Question 6

changes its direction of flow 60 times per second; series of impulses rather than in a continuous flow

Answer 6

alternating current (AC)

Question 7

the path that electricity flows

Answer 7

electrical circuit

Question 8

electromagnetic device for changing the current coming into the dental xray machine(step up and step down)

Answer 8

transformer

Question 9

a voltage compensator that corrects minor fluctuations in current flowing through the wires

Answer 9

autotransformer

Question 10

measures number of electrons that move through conductor; measures the quantity of electrons

Answer 10

amperage

Question 11

electrical pressure between two electrical charges(speed of electrons)

Answer 11

voltage or volt

Question 12

highest voltage to which the current in the tube rises during an exposure

Answer 12

kilovolt peak

Question 13

produces xrays when a stream of high speed electrons are stopped or slowed down

Answer 13

xray tube

Question 14

negative electrode; tungsten wire/filament; focusing cup

Answer 14

cathode

Question 15

positive electrode; target; copper stem/radiator

Answer 15

anode

Question 16

smallest on anode; smaller, sharper the image; small rectangular area on target of anode to which the focusing cup directs the electron beam

Answer 16

focal spot

Question 17

directs the electrons toward the target on the anode

Answer 17

focusing cup

Question 18

the filament wire on cathode, when heated to incandescence red hot and glowing, produces electrons

Answer 18

cathode; thermionic emission

Question 19

to provide a target to stop or significantly slow the high velocity electrons, converting their kinetic energy into xrays

Answer 19

anode

Question 20

release of electrons from hot filament when current flows after depressing exposure switch; the hotter the filament gets, the greater the number of electrons that are released

Answer 20

thermionic emission

Question 21

what is the focusing cup made of

Answer 21

molybdenum

Question 22

provides low voltage(3-8 V) to the filament of the xray tube to provide the source of electrons needed for the production of xrays

Answer 22

filament circuit

Question 23

provides the high voltaage (65-100 kV) necessary to accelerate the electrons from the cathode filament to the anode target

Answer 23

high voltage circuit

Question 24

step down volts

Answer 24

3-8

Question 25

step up volts

Answer 25

60-100kV

Question 26

xray in the center of the primary beam

Answer 26

central ray

Question 27

what is removed by an aluminum filter

Answer 27

long wavelength and low penetrating xrays

Question 28

number of xrays

Answer 28

quantity

Question 29

penetrating ability of beam

Answer 29

quality