## Practical Problems in Mathematics for ElectriciansNow in its seventh edition, Practical Problems in Mathematics for Electricians contains 45 instructional units featuring updated materials, examples, and expanded mathematical operations for students and trainees of the electrical trade. Coverage begins with simple addition and subtraction of whole numbers and progresses through basic algebra and trigonometry, developing readers' awareness of electrical symbols, basic circuits, component terminology, and calculator use for success on the job. Word problems designed to encourage the use of logical deduction are just one of the hallmarks of this tried and true guidebook that provides the mathematical background students need to succeed in the electrical field. Explanations at the beginning of each unit foster a better understanding of the concepts being presented; while problems related to electricity help develop an appreciation for electrical terms and practices. |

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### Contents

Multiplication of Whole Numbers I | 10 |

COMMON FRACTIONS | 23 |

Division of Common Fractions I | 38 |

Multiplication of Decimal Fractions I | 54 |

PERCENT AVERAGES AND ESTIMATES | 67 |

InterestI | 71 |

DiscountI | 74 |

Averages and Estimates I | 77 |

Proportion I | 129 |

Combined Operations with Ratio and Proportion I | 132 |

FORMULAS 135 | 135 |

Rearrangement in Formulas I | 139 |

General Simple Formulas I | 143 |

Ohms Law Formulas I | 153 |

Power Formulas I | 160 |

Combined Problems on Formulas I | 163 |

Combined Problems on Percents Averages and Estimates I | 80 |

POWERS AND ROOTS | 83 |

Roots I | 86 |

Combined Operations with Powers and Roots I | 91 |

Metric Measure and Scientific Notation I | 93 |

MEASURE | 99 |

Area Measure I | 107 |

Volume and Mass Measure I | 113 |

Energy and Temperature Measure I | 121 |

Combined Problems on Measure 1125 | 125 |

RATIO AND PROPORTION 127 | 127 |

TRIGONOMETRY 167 | 167 |

Trigonometric Functions I171 | 171 |

Plane Vectors I | 180 |

Rotating Vectors 1187 | 187 |

Combined Problems in TrigonometryI | 191 |

Number Systems I | 194 |

APPENDIX205 | 205 |

GLOSSARY 7213 | 213 |

217 | |

### Other editions - View all

Practical Problems in Mathematics for Electricians Stephen L. Herman,Crawford G. Garrard Limited preview - 2001 |

### Common terms and phrases

3-phase amount amperes angle binary number BX cable calculator capacitance circuit shown circular mils coil column COMBINED OPERATIONS COMMON FRACTIONS conductor conduit connected cosine cost cross-sectional area current in amperes decimal fraction decimal number decimal point denominate numbers diagram digits discounts display divided electrician equal equivalent Example Express the answer Find the number Find the total formula gallon hertz hexadecimal number hole horsepower hypotenuse inch thick inches long inductance insulation kilowatt-hours kilowatts lamps length load meter m3 metric millimeters motor multiplied nearer hundredth nearer tenth nearer thousandth nth root number of watts number system octal Ohm's law ohms percent pieces pounds programmable logic controllers quantities ratio reactance resistance in ohms resistor revolutions per minute right triangle root Round the answer scientific notation side sq ft staples subtracted switch total number total resistance unit of measure vector voltage drop volts VOLUME MEASURE weight whole number wiring job