Electrical Science Calculations: 200 Questions with Full Worked Answers for Level 2 and Level 3 Electrical Installation (A4 PDF)
200 electrical science calculation questions, each with a full worked answer.
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
- A4 PDF, 114 pages: print the pages you need
Written by a City & Guilds 2391-51 qualified electrician. For electrical apprentices and Level 2 and 3 learners.
Independent publication. Not produced, endorsed or approved by City & Guilds, EAL, the IET or BSI. Contains no assessment questions. Physical constants are typical textbook values given for practice; no figure in the book may be used for design, installation or certification.
Save £14.97: get this workbook with the 2391-52 Inspection and Testing Practice Papers, Inspection and Testing Calculations and the BS 7671 A4:2026 Practice Papers in the Electrician Study Bundle for £34.99.
