Module 1

Question 1

It is a property of matter that results from the presence or movement of electric charge

Answer 1

ELECTRICITY

Question 2

It is anything that occupies space and has mass

Answer 2

Matter

Question 3

It is the smallest particle of an element that is capable of independent existence

Answer 3

ATOM

Question 4

It is the smallest particle of matter that is capable of free existence

Answer 4

MOLECULE

Question 5

It is a substance that cannot be decomposed any further by chemical action

Answer 5

ELEMENT

Question 6

It is a combination of two or more elements.

Answer 6

COMPOUND

Question 7

It is a material composed of two or more substances, each of which retains its own characteristics properties

Answer 7

MIXTURE

Question 8

It is a positively charged particle.

Answer 8

PROTON

Question 9

It is negatively charged particle

Answer 9

ELECTRON

Question 10

Neutral charge or no charge

Answer 10

NEUTRON

Question 11

It represents the number of protons and electrons of an atom.

Answer 11

ATOMIC NUMBER

Question 12

It represents the sum of protons and electrons of an atom.

Answer 12

ATOMIC MASS

Question 13

An atom or group of atoms that has a net positive or negative charge resulting from an unequal number of positively charged protons and negatively charged electrons.

Answer 13

ION

Question 14

It is an energy level or region about the nucleus of an atom in which electrons move.

Answer 14

SHELL

Question 15

Atom has 5 shells, what are those?

Answer 15

K-shell
L-shell
M-shell
N-shell
O-shell

Question 16

The electrons found in the outermost shell (valence shell)or orbit of an atom.

Answer 16

VALENCE ELETRONS

Question 17

3 electrical classification of materials

Answer 17

ELECTRICAL CONDUCTORS
ELECTRICAL INSULATORS
ELECTRICAL SEMICONDUCTORS

Question 18

Materials that allow the essentially free passage of current when connected to a battery or another source of electrical energy.

Answer 18

ELECTRICAL CONDUCTORS

Question 19

Materials that posses low conductivity or offer a relatively high resistance to the flow of electric current.
Also known as DIALECTRICS

Answer 19

ELECTRICAL INSULATORS

Question 20

Materials that have conductivity about Midway between good conductors and good insulators.

Answer 20

ELECTRICAL SEMICONDUCTORS

Question 21

It is the motion or transfer of charges from one region of a conductor to another. It’s unit is Ampere (A), named after Andre Marie Ampere.

Answer 21

ELECTRIC CURRENT

Question 22

Source of electric current

Answer 22

Static electricity - from friction
Thermoelectricity- from heat
Piezoelectricity - from pressure
Electrochemistry - from chemical action
Photoelectricity- from light
Magnetoelectricity- from magnetism

Question 23

It is the driving force behind current flow.

Answer 23

ELECTRIC VOLTAGE (V/E)

Question 24

The motion or transfer of charges from one region to another. Unit is Ampere (I)

Answer 24

ELECTRIC CURRENT

Question 25

It is the property of a material that limits the amount of flow of current and converts electric energy to heat energy. Unit is ohms

Answer 25

ELECTRICAL RESISTANCE (R)

Question 26

According to ohm's law " at least state conditions, the voltage across a resistor is directly proportional to the current flowing through it with the temperature remaining constant."

Answer 26

V=IR

Question 27

Defined as the rate at which electrical energy is expanded or used up. It is the rate electric energy is converted into another form, such as light, heat or mechanical energy. It's unit is Watt (W).

Answer 27

ELECTRIC POWER

Question 28

The capacity to do work. Measured in joules (J).

Answer 28

ENERGY

Question 29

It is the rate at which power is consumed over a specific period of time.

Answer 29

ELECTRICAL ENERGY CONSUMPTION

Question 30

Formula for energy conservation

Answer 30

W=Pt

Question 31

It is a collection of electrical elements interconnected in some specific way through which electric current flows or it is intended to flow.

Answer 31

ELECTRIC CURRENT

Question 32

Consist of a source, conducting parts and a load.

Answer 32

CIRCUIT

Question 33

It is an uninterrupted path allows a continuous flow of current through an electrical circuit.

Answer 33

CLOSED CIRCUIT

Question 34

If the path of current flow is interrupted.

Answer 34

OPEN CIRCUIT

Question 35

If an inadvertent shortcut develops in a circuit that permits the flow through an unintentional path, a shot circuit is created.

Answer 35

SHORT CIRCUIT

Question 36

Types of circuit connection

Answer 36

Series circuit Parallel circuit Combination circuit

Question 37

Circuit elements are said to be connected in series when they all carry the same current.

Answer 37

Series circuit

Question 38

Properties of series circuit

Answer 38

The same current flow through all the resistances. There will be voltage drop across each resistance Sum of the voltage drop is equal to the applied Voltage

Question 39

Circuit elements are connected in parallel when the same voltage is common to all of them.

Answer 39

Parallel circuit

Question 40

Properties of parallel circuit

Answer 40

•Voltage across each resistance of the parallel combination is the same • there are as many current paths as the number of branches • current in each branches is given by ohm's law •total current of the circuit is equal to the sume of branch

Question 41

The cost of electrical energy consumed.

Answer 41

ENERGY CHARGE

Question 42

The cost of electrical energy consumed.

Answer 42

ENERGY CHARGE

Question 43

Highest rate at which energy is consumed in kilowatts

Answer 43

MAXIMUM DEMAND

Question 44

The billing fee related to the maximum charge.

Answer 44

DEMAND CHARGE