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<. 'EA+#& (8 points% Electricity ;acts Electricity plays an important role in everyday life6 learn more a$out static electricity6 electricity6 electric eels6 circuits6 lightning6 electric shoc56 volts6 amps and much more. Fodern society relies heavily on the convenience and versatility of electricity. electricity. +t powers your microwave6 helps light your house6 lets you watch ? and so much more. FElectric current is measured in amperes (amps%. FElectric potential energy is measured in watts. Fwo positive charges repel each other6 as do two negative charges. /pposite charges on the other hand attract each other. F=hen an electric charge $uilds up on the surface of an o$Gect it creates static electricity. Hou have
pro$a$ly experienced static electricity in the form of a small electric shoc56 which is what happens when the electric charge is quic5ly neutraliIed $y an opposite charge. FElectric eels can produce strong electric shoc5s of around 11 volts for $oth self defense and hunting. FElectric circuits can contain parts such as switches6 transformers6 resistors and capacitors. FA common way to produce electricity is $y hydropower6 a process that generates electricity $y using water to spin tur$ines attached to generators. Fhe world>s $iggest source of energy for producing electricity comes from coal. he $urning of coal in furnaces heats $oiler water until it $ecomes steam which then spins tur$ines attached to generators. F,ightning is a discharge of electricity in the atmosphere. ,ightning $olts can travel at around 816111 5ph (916111 mph%6 while reaching nearly 916111 J (26111 J;% in temperature. FElectricity plays a role in the way your heart $eats. uscle cells in the heart are contracted $y electricity going through the heart. Electrocardiogram (E&% machines used in hospitals measure the electricity going through someone>s heart6 when the person is healthy it usually shows a line moving across a screen with regular spi5es as the heart $eats. FHou may have heard of direct current (% and alternating current (A%. he difference $etween the two is in the way the electrons flow. +n electrons move in a single direction while in A they change directions6 switching $etween $ac5wards and forwards. he electricity use in your home is A while comes from sources that include $atteries. Fs there was even a Kwar of currents> $etween homas Edison (who helped invent % and #i5ola esla (who helped invent A%. s the difference $etween direct current and alternating current7 he difference $etween the two is in the way the electrons flow. +n electrons move in a single direction while in A they change directions6 switching $etween $ac5wards and forwards. he electricity use in your home is A while comes from sources that include $atteries.
=hat>s the relationship $etween electricity and the human heart7 FElectricity plays a role in the way your heart $eats. uscle cells in the heart are contracted $y electricity going through the heart. Electrocardiogram (E&% machines used in hospitals measure
the electricity going through someone>s heart6 when the person is healthy it usually shows a line moving across a screen with regular spi5es as the heart $eats. an you thin5 of any other role of electricity in our life7 Electricity plays a very important role in the community of our life. +t manifests itself6 among others6 throughB pu$lic lighting in plaIas6 par5s6 motorways6 tunnels6 roads6 etc.6 in order to provide security and visi$ility to )edestrians and improved traffic in night hoursL he traffic lights on the pu$lic road allow to regulate and control the flow of vehicles
. ='++#& (1.x238 )oints% Answer the following questions (91 words per question% . =hy are you studying Electricity7 + study electricity $ecause + would li5e to have 5nowledge a$out it and also $ecause + would li5e to wor5 and to $e a$le to move in the world of electricity 8. =hat is your favorite part or activity regarding electricity7 (circuits6 automation6 etc% =hy7 he automation
2 =hat are the most important characteristics of a good electrician7 • :ave manual s5ills6 to use a variety of tools and equipment. • A$ility to read and interpret technical drawings. •
