1

Question 1

is a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or
dynamically as a current

Answer 1

electricity

Question 2

a secondary energy source that can be generated
from primary sources such as fossil fuels, nuclear, and renewable resources like
sunlight, wind, and hydropower.

Answer 2

electricity

Question 3

the flow of electric charge

Answer 3

electricity

Question 4

The
unit of measure for electric charge is

Answer 4

coulomb

Question 5

the unit of measure for the flow of
electric charge is measured in

Answer 5

amperes

Question 6

the force that drives the electric charge

Answer 6

voltage

Question 7

voltage is measured in

Answer 7

volts

Question 8

opposes the flow of the electric current

Answer 8

resistance

Question 9

resistance is measured in

Answer 9

ohms

Question 10

2 types of electricity

Answer 10

static and dynamic electricity

Question 11

the result of an imbalance between negative
and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.

Answer 11

static electricity

Question 12

the flow of electric charges through a
conductor; in other words, an electric current.

Answer 12

dynamic electricity

Question 13

Electrification of objects occurs when they gain a

Answer 13

net positive charge
or a net negative charge

Question 14

An object may be electrified in _ ways:

Answer 14

3

Question 15

When two objects are rubbed together, electrons may transfer from one object to the other.
The object that gains electrons becomes negatively charged, while the object that loses electrons
becomes positively charged.

Answer 15

friction

Question 16

friction: the object that gains electrons becomes _____, while the object that loses electrons
becomes ______.

Answer 16

negatively charged, positively charged

Question 17

When a charged object comes into direct contact with a neutral object, electrons transfer between them. This results in the neutral object acquiring the same type of charge as the charged object.

Answer 17

Conduction

Question 18

In this method, a charged object is brought near a neutral object without touching it. This causes a redistribution of charges within the neutral object, creating regions of opposite charges.

Answer 18

induction

Question 19

study of stationary or resting electric charges

Answer 19

electrostatics

Question 20

the attractive or repulsive force between two electrically charged objects

Answer 20

electrostatic force

Question 21

the electrostatic force between two charges is directly proportional to the product of their quantities and inversely proportional to the square of the distance between them

Answer 21

coulomb’s law

Question 22

the steady flow of electric charges or the flow of electrons from atom to atom

Answer 22

dynamic electricity

Question 23

more commonly known as the electric current or electricity

Answer 23

dynamic electricity

Question 24

electrons in the more remote orbitals experience ______ from the nucleus and are also repelled by other electrons, more loosely bound.

Answer 24

less force of attraction

Question 25

2 outer bands

Answer 25

valence, conduction band

Question 26

material with a large number of electrons in the conduction band =

Answer 26

good electrical conductor

Question 27

materials that readily allow a flow of electrons.

Answer 27

conductors

Question 28

5 electrical conductors

Answer 28

silver, gold, copper, steel, sea water

Question 29

conductor -

Answer 29

overlap

Question 30

materials with no electrons in the conduction band =

Answer 30

good electrical insulator

Question 31

will only allow electron flow in extreme conditions

Answer 31

insulators

Question 32

insulator-

Answer 32

large gap

Question 33

5 electrical insulators

Answer 33

rubber, glass, oil, diamond, dry wood

Question 34

behaves as an insulator and a conductor

Answer 34

semi-conductors

Question 35

silicon and germanium are examples of this

Answer 35

semi-conductors

Question 36

semi-conductor-

Answer 36

small gap

Question 37

the movement of electric charge or is the moving electrons

Answer 37

electric current

Question 38

rate of flow of electrons

Answer 38

electric current

Question 39

the number of electrons passing through a given point per unit time

Answer 39

electric current

Question 40

1 ampere=

Answer 40

1 coulomb flowing at a given point in 1 sec

Question 41

2 types of current

Answer 41

direct current DC AND alternating current AC

Question 42

type of current that flows in only one direction

Answer 42

DC

Question 43

battery is a good example of this type of current

Answer 43

DC

Question 44

current that changes direction in cycles as the electric potential of the source changes

Answer 44

AC

Question 45

an example of this type of current is electric socket

Answer 45

AC

Question 46

2 current through an xray tube

Answer 46

filament current, tube current

Question 47

small current applied to the filament of the xray tube

Answer 47

filament current

Question 48

rate of flow of electrons that have travelled across the tube

Answer 48

tube current

Question 49

filament current of about 5-7 A will generate tube current measured in

Answer 49

milliamperes mA

Question 50

driving force which moves the electrons along the conductor

Answer 50

electric potential

Question 51

the ability to do work because of separation of charges

Answer 51

electric potential

Question 52

electrons flow from abundance to deficiency and will continue to do so as long as that difference exists

Answer 52

electric potential

Question 53

unit of electric potential

Answer 53

Volt V

Question 54

this is what propels the electrons to move from cathode to anode even in the absence of conductor

Answer 54

electric potential

Question 55

the impedance to the flow of electrons, reduces the flow of electric current through a circuit. also dependent on the material used as a conductor.

Answer 55

electric resistance

Question 56

measure of how the device or material reduces the electric current flowing through a circuit

Answer 56

electric resistance

Question 57

factors affecting resistance

Answer 57

material, length, cross-sectional area, temperature

Question 58

long conductor has more resistance

Question 59

small cross-sectional area has more resistance

Question 60

metallic conductors, as temp rises, resistance is also greater

Question 61

relationship between voltage, current, resistance

Answer 61

Ohm’s law

Question 62

only applies to metallic conductors

Answer 62

ohms’ law

Question 63

voltage across the total circuit or any part of that circuit is equal to the current multiplied by the resistance

Answer 63

ohms law

Question 64

law stating that current is proportional to voltage and inversely proportional to resistance

Answer 64

ohms law

Question 65

power loss: lost energy in the cable is converted to

Answer 65

heat

Question 66

power loss can be kept to minimum by

Answer 66

reducing current flowing within the cable, reducing resistance of the cable

Question 67

usual incoming line voltage for xray machine in the philippines

Answer 67

220 V, 60 hz AC single-phase/three-phase power

Question 68

Xray machine can be divided into

Answer 68

control console, high voltage generator, xray tube

Question 69

allows the radiologic technologists to control the xray tube current and voltage. most familiar to the radtechs

Answer 69

control console

Question 70

increases the low voltage from autotransformer to high voltage in kilovolts

Answer 70

high-voltage generator

Question 71

converts ac to dc and provides the current necessary for the filament

Answer 71

high-voltage generator

Question 72

primary part of the xray imaging system

Answer 72

xray tube

Question 73

converts electrical energy into electromagnetic energy in the form of xray

Answer 73

xray tube