Chapter 2 pt 3: radiation physics

Question 1

electricity

Answer 1

energy that is used to make xrays

Question 2

electrical energy that consists of a flow of electrons

Answer 2

electrical current

Question 3

direct current (DC)

Answer 3

when the electrons flow in one direction through the conductor

Question 4

Alternating current (AC)

Answer 4

when electrons flow in two opposite directions

Question 5

Rectification

Answer 5

conversion of AC to DC

Question 6

measurement of the number of electrons moving through a conducgtor

Answer 6

amperage

Question 7

what is current measured in

Answer 7

Amperes (A) or milliampres (mA)

Question 8

the amperage or number of electrodes passing through the cathode filament can be increased or decreased by the ______

Answer 8

milliamperage

Question 9

the voltage of the xray tube current , or the current passing from the cathode to the anode is controlled by _____

Answer 9

kV

Question 10

what is a circuit

Answer 10

path of electrical current

Question 11

how much voltage does the high volatge circuit use?

Answer 11

65000 - 100 000 V

Question 12

What is a transformer ?

Answer 12

a device used to decrease or increase the volathe in an electrical circuit

Question 13

three types of transformers

Answer 13

step down transformer
step up transformer
auto transformer

Question 14

used to decrease voltage from the incoming 110-200 line volatge to the 3 to 5 V by the filament circuit

Answer 14

step down transformer

Question 15

used to increase the voltage from the incoming 110 or 220 line voltage to the 65 000 - 1000 000 volts used by the high voltage circuit

Answer 15

step up transformer

Question 16

serves as a voltage compensator for minor fluctuations in the current

Answer 16

auto transformer

Question 17

braking radiation

Answer 17

the sudden stopping of high speed electrons when they hit the tungsten target

Question 18

When an xray photon collides with a loosely bound, outer shell electron and gives up part of its energy to eject the electron from its orbit this is called _______ ______

Answer 18

compton scatter

Question 19

new weaker xray photon that interacts with other atoms until all its energy is gone, is called _____ _____

Answer 19

compton electron or recoil electron

Question 20

when xrays interact with matter this is known as ______ ______ . This involes an xray photon that has its path altered by matter. Occurs when a low energy x ray photon interacts with an outer shell electron

Answer 20

coherent scatter

accounts for 8% of the interactions of the dental xray beam with matter

Question 21

xray can pass through the patient without any _______

xray photons can be completely ________ by the patient

xray photons can be ________

Answer 21

interaction

absorbed

scattered