Pre-Reading

Question 1

What is Matter made up from?

Answer 1

Atoms which then form elements

Question 2

An ATOM is made up of 3 smaller particles what are they?

Answer 2

Protons, Neutrons and Electrons

Question 3

The Protons and Neutrons make up the centre of the ATOM what is this called?

Answer 3

Nucleus

Question 4

What creates an electron cloud around the Nucleus?

Answer 4

Electrons moving very quickly.

Question 5

According to the laws of physics…

Answer 5

Like electrical charges repel each other. Protons within a nucleus should repel each other.

Question 6

Protons have what kind of an electrical charge?

Answer 6

Positive, represented with the mark of a “+”

Question 7

What charge does a Neutron have?

Answer 7

No charge.

Question 8

What do Neutrons help in the production of?

Answer 8

Strong force which opposes and overcomes the repulsion between the protons and binds the Nucleus together.

Question 9

Electrons have what charge?

Answer 9

Negative and spin as they circle the nucleus a billion times per second

Question 10

Electrons mass is so small that it is not?

Answer 10

Counted in an Atoms mass.

Question 11

What BINDS the electron to the NUCLEUS?

Answer 11

The positive charge of the proton inside the nucleus binds the electron because of its negative charge - Unlike charges attract each other.

Question 12

As electrons spin and move around the nucleus what do they produce?

Answer 12

Magnetic Fields, in most substances equal number of electrons spin in opposite directions creating low magnetic fields.

Question 13

What causes a LARGER magnetic field

Answer 13

Electrons influencing each other to spin in the same direction reinforcing each other.

Question 14

Why is the FUNDAMENTAL FORCE called ELECTROMAGNETIC?

Answer 14

Because of the attraction between positive and negative charges as well as the magnetic fields.

Question 15

How is power and rotation produced in generators and Motors

Answer 15

Moving electrons(charges) and magnetic fields.

Question 16

What makes the atoms of 2 different elements different from each other? eg: Helium and Nitrogen

Answer 16

The varying numbers of protons and neutrons in the atom give different characteristics.
Helium: 2 protons 2 neutrons, Hydrogen = 1 Proton

Question 17

How many chemical elements are on the periodic table?

Answer 17

118

Question 18

What is the memory aid sentence for resistors?

Answer 18

Black beetles running on your garden bring very good weather. 0-9

Question 19

What tolerances are the Gold, Silver or No Colour bands of a resistor

Answer 19

Gold = +/- 5%, Silver = +/- 10%, No Colour = +/- 20%

Question 20

Work or power in a circuit is when electrical energy gets converted into energy of another form, what are these?

Answer 20

Heat, light or rotation. The higher their power rating the more they convert.

Question 21

The symbol for power is (P) and its unit of measurement is what?

Answer 21

Watts

Question 22

How is P (Watts) Calculated?

Answer 22

P (Watts) = V (Volts) x I (Amps)

Question 23

When is power ONLY present in an electrical circuit?

Answer 23

When BOTH Voltage and Current are present.

Question 24

If a component converts above its rated Watts what will happen?

Answer 24

It will be destroyed

Question 25

In a fraction what is the numerator and what is the denominator

Answer 25

Numerator is the top number of the fraction and the bottom is the denominator

Question 26

What is the first principle about Voltage in regards to parallel circuits?

Answer 26

Voltage is the same across all components in the circuit.

Question 27

What is the second principal of parallel circuits?

Answer 27

The total circuit current is equal to the sum of the individual branch currents

Question 28

What is the Rule of parallels circuits, how do you calculate total current?

Answer 28

I total = I1 + I2 + I3

Question 29

On a right angled triangle where is the hypotenuse?

Answer 29

Directly opposite the right angle and is always the longest side.

Question 30

On a right angled question how do you identify the ADJACENT

Answer 30

The side between the right angle and the Angle given.

Question 31

In a right angled triangle define the OPPOSITE

Answer 31

The side directly opposite the angle (not the right angle)

Question 32

Within a periodic tables block what is in the upper left corner and what does it represent?

Answer 32

The Atomic Number, Number of protons with in a single atom.

Question 33

In a periodic tables block what does that bottom number represent?

Answer 33

Elements atomic mass number, Average weight of as single atom (EG 1.008)

Question 34

What determines an elements positioning on the periodic chart?

Answer 34

Their atomic number or how many protons they have.

Question 35

How many electrons can the first shell of an electron shell hold?

Answer 35

Only 2 electrons

Question 36

The outermost shell of an atom can hold a maximum of how many electrons?

Answer 36

8

Question 37

What is the outermost electron shell referred to as and what is its role?

Answer 37

The valance shell, its electrons bond between atoms and electrical conductivity.

Question 38

Atoms with a valance shell consisting of 5-8 electrons is considered a what?

Answer 38

Insulator or Inert

Question 39

Atoms with a Valance shell consisting of 4 electrons are considered?

Answer 39

Semi Conductors

Question 40

Atoms with a Valance shell consisting of 1-3 electrons are considered?

Answer 40

Conductors

Question 41

Which flow directs electric charge from the positive side of the battery to the negative?

Answer 41

Conventional Flow Notation

Question 42

When the electric charge moves from the negative to positive side of the battery what is this called?

Answer 42

Electron Flow Notation

Question 43

What is the first principle of Series Circuits?

Answer 43

Current is the same through any component of the circuit, only 1 path for the electrons to flow in a circuit.

Question 44

What is the SECOND principle of a SERIES circuit?

Answer 44

Total Resistance is equal to the individual resistors. Rt = R1 + R2 + R3

Question 45

What is the THIRD principle of a SERIES circuit?

Answer 45

Supply Voltage is equal to the sum of all Voltage drops across each resistor.

Question 46

What is the FIRST principle of a PARALLEL circuit?

Answer 46

Voltage is equal across all components of the circuit.

Question 47

What is the SECOND principle of parallel circuits?

Answer 47

Total circuit current is equal to the sum of all individual branch currents. ( Itotal = I1 + I2 + I3)

Question 48

What is the THIRD principle of a parallel circuit.

Answer 48

Resistance: Individual resistances diminish to equal a smaller total resistance rather than add to make the total.

Question 49

Atoms with a Valance shell consisting of 1-3 electrons are considered?

Answer 49

Conductors

Question 50

Which direction do electrons actually flow in a circuit?

Answer 50

From Negative to Positive AKA Electron Flow Notation

Question 51

What is the International System of Units and what is its abbreviation?

Answer 51

A standardized system of units for measuring electrical units of measurement, Abbreviated SI