Basic Electrical and Electronics Engineering Principles

   At the end of this chapter you should be able to:
• appreciate that engineering systems may be represented by block diagrams
• recognize common electrical circuit diagram symbols
• understand that electric current is the rate of movement of charge and is measured in amperes
• appreciate that the unit of charge is the coulomb
• calculate charge or quantity of electricity Q from Q=It
• understand that a potential difference between two points in a circuit is required for current to flow
• appreciatethattheunitofp.d.isthevolt
• understand that resistance opposes current flow and is measured in ohms
• appreciate what an ammeter, a voltmeter, an ohmmeter, a multimeter and an oscilloscope measure
• distinguish between linear and non-linear devices
• state Ohm’s law as V=I /R or I=V/R or R=V/I
• use Ohm’s law in calculations, including multiples and sub-multiples of units
• describe a conductor and an insulator, giving examples of each
• appreciate that electrical power P is given by P=VI=I2R=V2/R watts
• calculate electrical power
• define electrical energy and state its unit
• calculate electrical energy
• state the three main effects of an electric current, giving practical examples of each
• explain the importance  of uses in electrical circuit