1.1 Etectrical Engineering: An OverviewElectrical engineeringis the profession concetned with systems thatoroduce. transmit, anal measureelectric signals. Elect cal engineeing;ombines the pbysicist's models of natural phenomena ith the mathe-matician's tools lor manipulating those modelsto produce systems thatmeet practical needs. Electiical systems pervade our lives;they are foundir homes, schools, workplaces, and transportation vehicles everywhereWe beginby presenting a few examples from each ofthe five major clas-sifications of electrical systems:. commu catlon syslems' computel systemst control systems. power sysEms. signal-processing systemsThen we describe how electrical engineers anallze and design suchsystemsConrmunication systems are electrical systems that generate' trans-mit. and distribute information. Well-known examples include televisionequipment, such as cameras, transmitters, receivers, and VCRS; radio tele-scopes, used to explore the univeise; satellite systems, which return images
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