Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.1 Model of atomic structure Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 1

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.2 Electrification by friction Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 2

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 3 Figure 2.3 Attraction and repulsion between electrical charges

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.4 Transfer of electrons from an electrically neutral body to a positively charged one 4

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.5 Transfer of electrons from a negatively charged body to a positively charged one 5

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.6 Construction of early electric motors and generators 6

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.7 Stylised hydroelectric station 7

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.8 Diesel-driven a.c. generator used as an alternative power supply in the event of the mains power being interrupted 8

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.9 Force diagram for Bank of solar cells mounted on a tower in the Northern Territory. A number of arrays similar to this have been installed to operate microwave repeater stations and obviate the need to provide more expensive alternative power supplies 9

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.10 Wimshurst machine 10

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 2.11 Basic thermocouple 11

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 12 Figure 2.12 Piezoelectric striker ignition system

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 13 Figure 2.13 Stylised distribution system

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 14 Figure 2.14 Types of circuits

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 15 Figure 2.15 Direction of current flow

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 16 Figure 2.16 Relationships between pressure and rate of flow

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 17 Figure 2.17 Electrical measuring instruments: (a) ammeter; (b) voltmeter

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 18 Figure 2.18 Instrument connections

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 19 Figure 2.19 Six-volt car battery connected to a lamp

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 20 Figure 2.20 Connections for measuring power with a wattmeter

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 21 Figure 2.21 Effect of temperature on resistance

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 22 Figure 2.22 Resistor types

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 23 Figure 2.23 Basic resistor symbols

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 24 Figure 2.24 Four band colour coding

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 25 Figure 2.25 Five band colour coding

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 26 Figure 2.26 Temperature- dependent resistors

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 27 Figure 2.27 Characteristic and construction of a light-dependent resistor

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 28 Figure 2.28 Other electrical components

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 29 Figure 2.29 A simple transformer

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 30 Figure 2.30 Energy conversion in a transformer

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 31 Figure 2.31 Current paths through the human body

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 32 Figure 2.32 Replaceable fuse elements

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 33 Figure 2.33 Actions of a circuit breaker

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 34 Figure 2.34 Principle of a residual current device

Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean 35 Figure 2.35 Neutral and earth details at a main distribution switchboard