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Home / Units and quantity

Units and quantity

A confident understanding of units of measurement and quantities are important to completing calculations accurately.

Lesson Topics
  • Units
  • Power numbers
TestsStatus
1

Test-Units and quantity


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Introduction to maths
  • Definitions
  • Numbers
  • Converting numbers
  • Rounding a number
  • Test-Introduction to maths
Introduction to calculations
  • Area and volume
  • Percentages
  • Reciprocals and parentheses
  • Squares and square roots
  • Algebra transposition
  • Test-Calculations
Ohms Law and Power
  • Direct current
  • Properties of conductors
  • Ohm’s Law
  • Power formula
  • Formula wheel
  • Using the formula wheel
  • Resistors in series
  • Resistors in parallel
  • Test-Ohms Law
Alternating current circuits
  • Alternating current
  • Impedance – Earth Fault Loop
  • Protective conductor size
  • Reactance
  • Impedance
  • Cable size
  • Voltage Drop
  • Impedance and power factor
  • True, reactive and apparent power
  • Test-AC circuits
Three phase circuits
  • Star connection
  • Delta connection
  • Transformers
  • Voltage drop in three phase circuits
  • Test-Three phase circuits
Feedback
Units and quantity
  • Units
  • Power numbers
  • Test-Units and quantity
Glossary
Practice Test - Maths for electricians
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