Physics 1

Front 1

max in the k shell

Back 1

2

Front 2

max in the l shell

Back 2

8

Front 3

max in the m

Back 3

18

Front 4

max in the n

Back 4

32

Front 5

max in the o shell

Back 5

50

Front 6

max in the p shell

Back 6

72

Front 7

max in the q shell

Back 7

98

Front 8

The current model of the atom that is considered most representative tot he structure of matter is the-

Back 8

Bohr method

Front 9

A proton is roughly how many times larger than an electron?

Back 9

1800

Front 10

When 2 or more atoms are chemically untied they form a?

Back 10

molecule

Front 11

What is true about the relationship between wavelength and frequency?

Back 11

As wavelength increases, frequency decreases

Front 12

A common property found with all energies of the electromagnetic spectrum is?

Back 12

velocity

Front 13

The relationship between current and a changing magnetic field is called:

Back 13

electromagnetic induction. Allows AC to induce just by being in proximity.

Front 14

Is it possible to step up both the voltage and the amperage together in a transformer?

Back 14

no. one goes up, the other must go down.

Front 15

TRUE OR FALSE. Holding a stationary electric field will produce a current in that conductor?

Back 15

False

Front 16

A device that converts mechanical energy to electrical energy is called a-

Back 16

Generator

Front 17

What is the type of magnet that is produced by heating an alloy within a strong magnetic filed?

Back 17

artificial permanent

Front 18

If a material has high permeability, it will have _____retentivity.

Back 18

low

Front 19

What type of material has a high permeability?

Back 19

ferromagnetic

Front 20

An autotransformer operates on____induction.

Back 20

self induction

Front 21

a series of coils of wire within proximity of each other will create a combined magnetic field that can be used as a tool. this device is known as a____

Back 21

solenoid

Front 22

Rectification of AC current is necessary for:

Back 22

changing current from AC to DC for devices like x-rays tubes and televsions

Front 23

A device that can take a DC current and turn it on and off several times per second in order to create an AC current is called a:

Back 23

Inverter DC-AC
Rectifier AC-DC

Front 24

They type of transformer taht can both increase and decrease a voltage in a circuit is known as an:

Back 24

autotransformer

Front 25

A device taht is used in portable x-ray machines that can accumulate and store an electrical charge is a:

Back 25

capacitor

Front 26

A positive ion is:

Back 26

an atom that has one more proton than electrons

Front 27

Electromagnetic waves are unique in that:

Back 27

they dont require a medium to maintain motion and can travel in a vacuum

Front 28

AC current in the united states flows at a frequency of:

Back 28

60 cycles per second = 60 hertz

Front 29

Converting AC current to DC current is done with a semiconductor called a

Back 29

Rectifier

Front 30

If a radiation has the strength to remove an electron from the orbit of an atom, it is known as:

Back 30

ionizing

Front 31

In an electric motor we are converting:

Back 31

electrical energy to mechanical energy

Front 32

One hertz is equal to:

Back 32

one cycle per second

Front 33

One kilowatt is:

Back 33

1000 ampers @ one volt
1000 volts @ one amp

Front 34

one tesla is equal to ____gauss.

Back 34

10000

Front 35

The amount of protons is equal to the:

Back 35

atomic number

Front 36

The energy of electromagnetic radiation is measured in:

Back 36

electron volts

Front 37

The formation of a positive ion happens when:

Back 37

an electron is removed from the orbit of an atom

Front 38

The most efficient waveform used in diagnostic radiologoy is:

Back 38

high frequency

Front 39

The transformation of radioactive nuclei into a different element is known as:

Back 39

radioactive decay. element gives up some of its nucleous

Front 40

The unit of current is:

Back 40

the amp

Front 41

the unit of electrical power is the:

Back 41

watt

Front 42

To induce an electric current into a stationary conductor, the electromagnetic field must be;

Back 42

changing

Front 43

X-rays and gamma rays differ in:

Back 43

origin- x-rays are mad made

Front 44

A binding energy of 69 keV is common with all K shell electrons of all atoms. TRUE OR FALSE

Back 44

false, just in tungsten is 69 keV

Front 45

TRUE FALSE. According to US public law 90-602, generators must terminate the exposure t 600 mAs for exposures above 50 kVp and 2000 mAs for exposures below 50 kVp

Back 45

TRUe

Front 46

Dipoles are:

Back 46

groups of atoms with a magnetic filed in a distinct direction

Front 47

A single wire with several coild used to combine the magnetic force of an electric current is also known as a:

Back 47

solenoid

Front 48

Direct current can be converted into alternating current with the use of:

Back 48

Inverters

Front 49

What has the least resistance against the flow of electrons?

Back 49

Superconductors. make conductor very cold

Front 50

_____is the force of electrical pressure that produces electron movement and current flow.

Back 50

Voltage

Front 51

the incoming power supply that most all stationary x-ray equipment operates from is:

Back 51

210-220 V

Front 52

With full wave rectified wave form, x-ray production starts and stops:

Back 52

120 times a second

Front 53

the unit of power is the watt. One watt is produced by:

Back 53

1 ampere flowing with a pressure of one volt.

Front 54

A P-N junction semiconductor allows current to travel.

Back 54

in only one direction in the circuit.

Front 55

The life expectancy of the tungsten filament is approx:

Back 55

6-9 hours

Front 56

Tungsten is the material of choice for filaments because of its high melting point and:

Back 56

that it is difficult to vaporize

Front 57

Because of the space charge effect the maximum mA range achievable with most diagnostic x-ray tubes is:

Back 57

1000-1200 mA

Front 58

A filament is subject to breaking after___of the diameter has vaporized.

Back 58

10 %

Front 59

A grid biased tube is different than conventional x-ray tubes in that:

Back 59

the focusing cup can be switched to a positive charge to absorb electrons

Front 60

The type of tube that has the ability to increase the negative charge to the focusing cup in order to reduce the size of the actual focal spot is known as:

Back 60

bias focusing.