2.1 To identify and describe the components of the design process.

Have the students describe the processes for each step in the design process.

Additional information about the design process may be found in the Design Studies Curriculum Guide in Module 1.

ELECTRON THEORY

2.2 To define common electrical terms. (COM)

Definitions should include:

• Voltage - electromotive force
• Current - the flow of electricity
• Resistance - the opposition to current flow
• Units of measurements - volts, amperes, ohms
• Ohm's Law.

2.3 to understand attraction and repulsion of electrically charged objects.

Demonstrate that like charges repel and unlike charges attract.

Demonstrate electrical field lines penetrating different material.

2.4. To understand the parts of an atom.

Work with students to:

• Identify material by atomic structure as an insulator, a conductor or a semi-conductor
• Define positive and negative ions
• Explain free electrons
• State the charges on each part of the atom
• Note that there are sub-atomic particles other than protons, neutrons and electrons.

INSULATORS AND CONDUCTORS

2.5 To understand the characteristics of materials that act as conductors, insulators and semi-conductors.

Identify valence shell of conductors.

List different materials that act as conductors. An activity to test current flow through various materials can be developed.

Draw the Bohr model of atomic structure.

Insulators:

• Identify different materials as insulators.
• Examine the atomic structure of an insulator.

Semi-conductors:

• Identify different materials as semi-conductors.
• Study the atomic structure of a semi-conductor.
• Examine the effect heat has on semi-conductor materials.
• Compare the atomic structure of the different semi-conductor materials.
• Explain that conductivity is a continuum, different materials conduct or resist differently.

DYNAMIC ELECTRICITY

2.6 To define electromotive force, current and resistance. (NUM, COM)

Students will explain the relationship between voltage current and resistance

Ohm. s Law is: V=IxR

• Voltage (V) = Current (I) x Resistance (R).

2.7 To solve Ohm's Law. (NUM)

Calculate voltage, current and resistance when given different simple circuits.

Wire simple circuits, taking voltage, current and resistance readings.

2.8 To solve Watt's Law. (NUM)

Define electrical power.

Use power formula to solve power output problems.

Power (W)=Voltage (V) x Current (I)

Calculate the power rating for equipment connected in series and parallel.

Calculate power loss and transmission efficiency.

SERIES CIRCUITS

2.9 To understand voltage, current and resistance in a series circuit. (NUM, CCT)

Students will observe and identify the characteristics of voltage, current and resistance in a series circuit and calculate values by doing the following:

• wire a series circuit and look at the characteristics of voltage, current and resistance by connecting meters to these circuits.
• use series circuits with known values to calculate the unknown values using the appropriate equations.
• observe different circuits and determine which one is a series circuit.

PARALLEL CIRCUITS

2.10 To understand the characteristics of voltage, current and resistance in a parallel circuit.

Students will look at the characteristics of voltage, current and resistance in a parallel circuit and calculate values.

Students should wire a parallel circuit and look at the characteristics of voltage, current and resistance by connecting meters to these circuits.

Give students parallel circuits with known values and have them calculate the unknown values using the appropriate equations.

Observe different circuits and determine which one is a parallel circuit.