Direct current fundamentals
By: Orla E. Loper, Edgar Tedsen.
Contributors: Tedsen, Edgar.
Edition: 6th ed.
Publisher: Delmar Publishers; Thomson Delmar Learning
Published: 2000
Place of publication: Albany, NY
Language: eng
Format: Trade Paperback
Number of pages: 476
Subjects: Electric engineering; Electric currents, Direct
Notes: Includes index.
Table of contents: title: What are electricity and electronics? -- Why this book is called Direct Current Fundamentals -- Early history of electricity -- 100 elements: building blocks of nature -- Atom analyzed: electrons, protons, and neutrons -- Atomic theory: cornerstone of electrical theory -- Electricity production by energy conversion -- Electricity from friction -- Electricity from magnetism -- Electricity from chemical energy -- Electricity from light --  Electricity from heat -- Electricity from mechanical pressure: piezoelectricity -- Effects of electricity -- Stationary electrons -- Electroscopes -- Electrostatic induction -- Lightning -- Nuisance static charges -- Useful static charges -- Potential energy of electrons -- Electric lines of force -- 3 measurable circuit quantities -- Voltage -- Current -- Resistance -- A simple electric circuit -- Open circuits and closed circuits -- Schematic diagram -- Basic circuit notation -- Short circuit -- Electrical safety -- National Electrical Code® -- Rationale for studying this unit -- Powers of 10 -- Scientific notation -- Significant digits -- Rounding off to 3 significant digits -- Metric prefixes -- Multiplication and division with powers of 10 -- Types of meters -- Ammeter and voltmeter scale interpretation -- Ohmmeter scale interpretation -- Electrical meter connection -- Conductance vs. resistance -- Resistivity of materials -- Length of a conductor -- Cross-sectional area (CSA) of a conductor in circular mils -- Effect of temperature on resistance -- American Wire Gauge (AWG) -- Stranded wire and cable -- Commercial resistors -- Voltage, current, and resistance -- Ohm's law with metric prefixes -- Energy -- Units of energy -- Power -- Energy and cost calculations -- Efficiency of energy conversion -- A practical application: resistance heating -- Characteristics of series circuits -- Voltage drop -- Resistance and current in series circuits -- Power consumption in series circuits -- Calculation of series circuit quantities -- Voltage drop on a line -- Voltage at an open element -- Series circuits as voltage dividers -- Polarity considerations -- Ground as a reference point -- Voltage sources in series -- Nature of parallel circuits -- 5 methods of computation -- Use of Ohm's Law for computing RT -- Use of the reciprocal equation -- A practical method -- Product over the sum formula -- A special condition: all equal resistors -- Power dissipation in parallel circuits -- Voltage sources in parallel -- A practical application: kitchen range heating element -- Simplifying series-parallel circuits -- Kirchhoff's voltage law -- Kirchhoff's current law -- Loaded voltage dividers -- Ionization process -- Useful chemical compounds -- Electroplating and electrolysis -- Gases as insulators -- Gaseous conduction by ionization -- Conduction and ions in nature -- Conduction in a vacuum -- Chemical energy: a source of emf -- Anodes and cathodes -- Primary cells -- Fuel cells -- Secondary cells -- Maintenance-free batteries -- Miscellaneous aspects of batteries -- Electricity and magnetism -- Simple magnets -- Magnetic field -- Ferromagnetic materials and the magnetizing process -- Magnetic materials and the atomic theory -- Permanent magnets -- Electromagnetism of a straight wire -- Electromagnetism of a coil -- Magnetic core in the coil -- Magnetic quantities -- Solenoids for lateral motion -- Electromagnetic relay -- Magnetic vibrators and bell -- Electromagnetism for rotational motion -- Other applications of the motor effect -- Electromagnetism at work -- d'Arsonval meters -- DC ammeters -- Multirange ammeters -- Voltmeters -- Ohmmeters -- Megohmmeters -- Wattmeters -- Wheatstone bridges -- Clamp-on meters -- Moving coils, stationary fields -- Moving fields, stationary coils -- Left-hand rule for generators -- Lenz's law -- Induction in rotating machines -- Principles of DC generators -- Armature design -- Generator field structures -- Armature reaction -- Buildup of self-excited fields -- 3 types of self-excited generators (series, shunt, and compound) -- Separately excited generators -- Generator calculations -- Power losses -- Generator data and ratings -- Magnetohydrodynamic (MHD) generation -- Basic motor action -- Torque and rotary motion -- Need for commutation -- Need for added armature coils -- From torque to horsepower -- DC machines: motor or generator? -- Counter-emf in a motor -- Armature windings -- Field distortion and the need for interpoles -- Shunt motor -- Series motor -- Compound motor -- Speed control of DC motors -- Reversal of rotation -- Power losses -- Permanent magnet motors -- Trends in motor control -- Need for reduced-voltage starting -- Manual starters -- Manual speed controllers -- Starters for series motors -- Drum controllers -- Magnetic controllers -- Counter-electromotive force motor controller -- Voltage drop acceleration controller (lockout acceleration) -- Definite time controller -- Electronic controllers -- Loop current method -- Superposition theorem -- Thevenin's theorem.