Ingeniero

Table of Contents

Introduction...............................................................................2 Conductors.and.Insulators.........................................................3 Current,.Voltage,.and.Resistance...............................................6 Ohm’s.Law..............................................................................  .DC.Circuits.............................................................................. 3 Magnetism..............................................................................20 Alternating.Current..................................................................23 . Inductance.and.Capacitance. ..................................................30Reactance.and.Impedance......................................................35 . Series.and.Parallel.R-L-C.Circuits.............................................40 Power.and.Power.Factor.in.an.AC.Circuit.................................43 Transformers............................................................................47 Review.Answers......................................................................53Final.Exam...............................................................................56



Introduction

Welcome.to.the.first.course.in.the.STEP.series,. Siemens.Technical.Education.Program.designed.to.prepare. our.distributors.to.sell.Siemens.Industry,.Inc..products.more. effectively..This.course.covers.Basics of Electricity.and.is. designed.to.prepare.you.for.courses.on.Siemens.Industry,.Inc.. products.Upon.completion.of.Basics.of.Electricity.you.will.be.able.to:

•. •. •. •. •. •. •. •. •. •. •. •.

Explain.the.difference.between.conductors.and.insulators Use.Ohm’s.law.to.calculate.current,.voltage,.and. resistance Calculate.equivalent.resistance.for.series,.parallel,.or. series-parallel.circuits Calculate.voltage.drop.across.a.resistor Calculate.power.given.other.basic.valuesIdentify.factors.that.determine.the.strength.and.polarity.of. a.current-carrying.coil’s.magnetic.field Determine.peak,.instantaneous,.and.effective.values.of.an. AC.sine.wave Identify.factors.that.effect.inductive.reactance.and. capacitive.reactance.in.an.AC.circuit Calculate.total.impedance.of.an.AC.circuit Explain.the.difference.between.real.power.and.apparent. power.in.an.AC.circuitCalculate.primary.and.secondary.voltages.of.single-phase. and.three-phase.transformers Calculate.the.required.apparent.power.for.a.transformer

This.knowledge.will.help.you.better.understand.customer. applications..In.addition,.you.will.be.better.able.to.describe. products.to.customers.and.determine.important.differences. between.products.. After.you.have.completed.this.course,.if.you.wish.to.determine.how.well.you.have.retained.the.information.covered,.you.can. complete.a.final.exam.online.as.described.later.in.this.course..If. you.pass.the.exam,.you.will.be.given.the.opportunity.to.print.a. certificate.of.completion.from.your.computer. 2

Conductors and Insulators

Elements of an Atom.

All.matter.is.made.up.atoms..Atoms.have.a.nucleus.with. electrons.in.motion.around.it..The.nucleus.is.composed.of.protons.and.neutrons.(not.shown)..Electrons.have.a.negative. charge.(-)..Protons.have.a.positive.charge.(+)..Neutrons.are. neutral..In.the.normal.state.of.an.atom,.the.number.of.electrons. is.equal.to.the.number.of.protons.and.the.negative.charge.of. the.electrons.is.balanced.by.the.positive.charge.of.the.protons.

Free Electrons.

Electrons.move.about.the.nucleus.at.different.distances..The.closer.to.the.nucleus,.the.more.tightly.bound.the.electrons.are. to.the.atom..Electrons.in.the.outer.band.can.be.easily.force.out. of.the.atom.by.the.application.of.some.external.force.such.as.a. magnetic.field,.friction,.or.chemical.action. Electrons.forced.from.atoms.are.sometimes.called.free electrons..A.free.electron.leaves.a.void.which.can.be.filled.by. an.electron.forced.out.of.another.atom..

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Conductors....