BTEC Level 3 Unit 6  Electrical and Electronic Principles
Unit Information
This is a mandatory unit
Credit value: 10
This unit aims to give learners an understanding of the underlying physical principles on which electrical and electronic devices and circuits depend.
The BTEC specification for this unit can be found here.
On completion of this unit a learner should:
 Be able to use circuit theory to determine voltage, current and resistance in direct current (DC) circuits
 Understand the concepts of capacitance and determine capacitance values in DC circuits
 Know the principles and properties of magnetism
 Be able to use singlephase alternating current (AC) theory.
Assessment
This unit has 6 Assignments:
 Assignment 6  Diodes and Power Supplies (P3)
Note: Assignment 6 is set in Unit 35  Principles and Applications of Electronic Devices and Circuits.
Assignment Tracking submission and progression sheets can be viewed by asking the unit tutor
Topics covered by Lesson
There are 4 learning outcomes covered by this unit. These are:

 Voltage and current


 Ohms law

 A worked example can be found here
 Potential divider presentation
 Current divider
 DC circuit theory examples

 Energy stored

 Practical method
 Graphical method  initial slope and 3 points
 Magnetism and Inductance

 Flux Density (B)
 Magnetic field strength (H)

 DC Motors
 DC Generators
 Inductors
 Transformers
 Loudspeakers
 Relays and other Solenoids


 Induction  Self and Mutual
 Sinusiodal waveform parameters
 Addition and subtraction of sine waves
 Graphical method
 Phasor method

 Capacitive
 Inductive
 CIVIL
 Power Supplies, including half and full wave rectification
Recommended Websites
 A good website for support material can be found at http://www.electronicstutorials.ws, you would be well advised to explore these sites.
 Another useful site can be found at http://www.bassix.eu/
 Instructions on the use of a multimeter can be found at http://www.doctronics.co.uk/meter.htm
Recommended Reading
 Boyce A, Cooke E, Jones R and Weatherill B, BTEC Level 3 National Engineering Student Book, (Pearson, 2010) ISBN 9781846907241
 Bird J O, Electrical and Electronic Principles and Technology, (Newnes, 2004) ISBN 0750665505
 Bird J O, Electrical Circuit Theory and Technology, (Newnes, 2004) ISBN 0750657847
 Robertson C R, Fundamental Electrical and Electronic Principles, (ButterworthHeinemann, 2001) ISBN 0750651458