- A4 PDF · 114 pages
- Level 2 and 3
- Apprentices
Electrical Science Calculations
Practice Questions with Full Worked Answers
For electrical apprentices and Level 2 and 3 learners.
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Also in the Electrician Study Bundle: all four PDFs for £34.99.
Written by a City & Guilds 2391-51 qualified electrician.
What is inside
What you get
Electrical science is easier with practice. This workbook takes you from unit conversions and Ohm’s law to three-phase power, transformers and motors, with the formula, the numbers and the result shown for every answer.
- 200 questions in 15 sections, graded Easy, Core and Challenging
- Units, SI prefixes and transposition; Ohm’s law; power, energy and electricity cost; series and parallel resistors
- Resistivity and temperature coefficient; magnetism and electromagnetism; capacitance and time constants
- AC waveforms, reactance and impedance, power factor and power-factor correction
- Three-phase star and delta, transformers, induction motors, mechanics and lighting
- All the data each question needs is given in the question, so you practise the method rather than looking things up
- Every numerical answer was calculated by computer and checked by a second, independent calculation, and every printed line of working was re-calculated from its printed figures
- Method notes and key formulas at the start of each section, plus a two-page formula sheet
- A squared working box with every question
At a glance
- Format
- A4 PDF, 114 pages, clickable contents. Print the pages you need.
- Questions
- 200, in 15 sections, graded Easy, Core and Challenging
- Answers
- A full worked answer for every question
- For
- Electrical apprentices and Level 2 and 3 learners
Every figure a question needs is given in the question. Physical constants are typical textbook values given for practice; no figure in the book may be used for design, installation or certification.
Contents
Contents
Front matter: how to use this book and a two-page formula sheet. Then 15 sections, each with method notes, followed by the worked answers.
- Units, prefixes and transposition
- Ohm’s law
- Power, energy and cost
- Series and parallel resistors
- Resistivity and temperature coefficient
- Magnetism and electromagnetism
- Capacitance
- AC waveforms
- Reactance and impedance
- AC power and power factor
- Three-phase supplies
- Transformers
- Motors
- Mechanics
- Lighting
Sample pages
Pages from the PDF
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