Review booklet

Question 1

Substance made up of atoms of more than one type is a?

Answer 1

compound

Question 2

The atomic number of an element refers to the number of _____ in the _____ of the atom?

Answer 2

protons and nucleus

Question 3

Maximum number of electrons that can be in the valence of an atom?

Answer 3

8

Question 4

In orbits further from the nucleus the energy possessed by the electrons increases or decreases?

Answer 4

increases

Question 5

An electron that has broken loose from its atom is what?

Answer 5

a free electron

Question 6

What are good conductors?

Answer 6

most metals

Question 7

According to coulomb’s law, if the distance between two point charges is decreased by four times, the force between the charges will ______ by _________ times

Answer 7

increase by 4 times

Question 8

An atom that has a positive charge posses more or less electrons than protons?

Answer 8

less

Question 9

Five useful applications of electrostatic charge?

Answer 9

Air filters 
Printers
Photocopiers 
Painting 
Dust removal

Question 10

Two hazards situations caused by electrostatic charge?

Answer 10

flammable gas, touching something with a charge

Question 11

Three ways a body may receive an electrostatic charge?

Answer 11

friction
conduction
induction

Question 12

A force that acts at a distance without physical contact is referred to as which force?

Answer 12

magnetic force

Question 13

refers to the charge at one point with respect to another?

Answer 13

electrical potential energy

Question 14

If one of two charges has its magnitude doubled, then the force between the two charges will ______ by ________ times?

Answer 14

increase by two times

Question 15

Devices designed to change other forms of energy into electrical energy are referred to as?

Answer 15

Source

Question 16

Six methods of producing electricity?

Answer 16

Light
heat
friction
pressure
chemical
magnitism

Question 17

Device that generates electricity from the suns energy is called?

Answer 17

a solar panel

Question 18

The work-per-unit-charge done by source on the electric charges, to move them against the electric field, is referred to as?

Answer 18

electromotive force

Question 19

Most of the electrical energy used in homes is produced by what?

Answer 19

magnetic energy

Question 20

Law of conservation of energy?

Answer 20

energy may neither be created nor destroyed

Question 21

The solar cell in a simple calculator is called a?

Answer 21

photovoltaic cell

Question 22

The charge on 6.24 x 10 to 18 power is referred to as a ________?

Answer 22

coulomb

Question 23

If four coulombs or charge pass a given point in a conductor over a period of two seconds, current is flowing at the rate of _________ amperes?

Answer 23

two

Question 24

What is the term used to represent the opposition to current flow in an electrical circuit?

Answer 24

load/resistance

Question 25

If the voltage applied to a circuit increases, the current through the circuit?

Answer 25

increases

Question 26

air the resistance of a circuit decreases, the current flowing through the circuit?

Answer 26

increases

Question 27

if the resistance of a circuit decreases, the power dissipated by the circuit?

Answer 27

increase

Question 28

if the voltage applied to a circuit doubles, the power dissipated by the circuit _______ by _________ times?

Answer 28

increase by four

Question 29

Ohms law in words?

Answer 29

Current flowing is directly proportional to the voltage and inversely to the resistance of the circuit

Question 30

State watts law in words?

Answer 30

Power in a circuit is equal to the voltage times the current

Question 31

The product of emf, current and time is ________?

Answer 31

energy

Question 32

The product of emf and current is _________?

Answer 32

power

Question 33

the product of power and time is __________?

Answer 33

energy

Question 34

if the voltage applied across a purely resistive device is made three times larger, the power dissipated by that device is multiplied by ?

Answer 34

9

Question 35

If the voltage applied to an electrical circuit is doubled, what happens to the current flowing through that circuit?

Answer 35

It will double

Question 36

The diagram that is easiest to understand for a person with little knowledge of electricity is what?

Answer 36

Pictorial diagram

Question 37

The type of schematic diagram that shows the power source as two vertical lines in either side of the drawing is called a ?

Answer 37

ladder diagram

Question 38

Main difference between a block diagram and a one-line diagram is that to represent the components, a block diagram uses _________ and a one-like diagram uses___________?

Answer 38

blocks and symbols

Question 39

Schematic diagrams do not show the _________ relationship between components?

Answer 39

physical

Question 40

Type of diagrams in which components are shown as they really appear on diagrams

Answer 40

pictorial

Question 41

Diagram that is a type of flow chart is called what?

Answer 41

block diagram

Question 42

Type of diagram that is usually the first drawing an engineer does is the?

Answer 42

block OR line diagrams

Question 43

Type of diagram that is a circuit map?

Answer 43

Wiring diagram

Question 44

Type of diagram that shows a 3-dimensional view of the component is the ?

Answer 44

pictorial diagram

Question 45

Which diagram does not show the individual conductors?

Answer 45

one line diagram

Question 46

Device that changes electrical energy into other forms of energy is referred to as a ?

Answer 46

load

Question 47

A parallel path of low resistance is the definition of a ?

Answer 47

short circuit

Question 48

The two main types of damage that are likely to occur because of excessively high current are _________ and ___________

Answer 48

thermal and mechanical

Question 49

how does current flow through a load?

Answer 49

negative to positive

Question 50

The term that refers to the charge at one point with respect to another point is ?

Answer 50

Polarity

Question 51

A fuse or circuit breaker protects a circuit from excessive current by ________ the circuit when too much current flows through it

Answer 51

opening

Question 52

When a switch is in the open position , is it on or off?

Answer 52

off

Question 53

Current flows through the SOURCE from?

Answer 53

positive to negative

Question 54

What are the three necessary components of a circuit?

Answer 54

source, load, and conductors

Question 55

What will happen if you connect a DC meter with the wrong polarity?

Answer 55

It will deflect below 0 and damage the mater possibly

Question 56

The type of reading error that takes place when you do not look at the needle straight on is referred to as a _________ error?

Answer 56

Parallax

Question 57

What are the 3 ratings you must be careful not to exceed when you are using a watt meter?

Answer 57

voltage coil, current coil, power

Question 58

If a VOM meter does not have an off position , where should the range selector be left when the meter is not being used?

Answer 58

highest a/c voltage range

Question 59

Why should the VOM meter never be left on an ohms setting when the meter is not being used?

Answer 59

If there is any continuity between the leads it will drain the battery

Question 60

What must you remember to do every time you switch ranges on an ohmmeter?

Answer 60

Zero the meter

Question 61

Bus bars come in 3 different shapes, what are they?

Answer 61

Hollow tube, solid square, solid rectangle

Question 62

Conductors come in 3 different types of stranded configurations, name them?

Answer 62

concentric, bunch, and rope