BASIC ELECTRICAL THEORY EXAM

This exam will test you level of comprehension on the basic electrical theory section of the electrical training course.   … [Read more...]

BASIC ELECTRICAL THEORY 6

 <previous BASIC ELECTRICAL THEORY 6 BASIC ELECTRICAL THEORY EXAM  click here What is a magnetic circuit? To better understand magnetic circuits, a basic understanding of the physical qualities of magnetic circuits will be necessary.     Hysteresis When current in a coil reverses direction thousands of times per second, hysteresis can cause considerable … [Read more...]

BASIC ELECTRICAL THEORY 5

  <previous  BASIC ELECTRICAL THEORY 5  next> Magnetism   Certain metals and metallic oxides have the ability to attract other metals. This property is called magnetism, and the materials which have this property are called magnets. Some magnets are found naturally while others must be manufactured. Magnetism is a result of electrons spinning on their own axis around the … [Read more...]

BASIC ELECTRICAL THEORY 4

 <previous  BASIC ELECTRICAL THEORY 4  next> METHODS OF PRODUCING VOLTAGE   Electrochemistry Chemicals can be combined with certain metals to cause a chemical reaction that will transfer electrons to produce electrical energy. This process works on the electrochemistry principle. One example of this principle is the voltaic chemical cell, shown in Figure 11. A chemical reaction … [Read more...]

BASIC ELECTRICAL THEORY 3

<previous  BASIC ELECTRICAL THEORY 3  next> UNITS OF ELECTRICAL MEASUREMENT   System International (SI) Metric System Electrical units of measurement are based on the International (metric) System, also known as the SI System. Units of electrical measurement include the following:   Voltage Voltage, electromotive force (emf), or potential difference, is described as the … [Read more...]

BASIC ELECTRICAL THEORY 2

<previous  BASIC ELECTRICAL THEORY 2  next> ELECTRICAL TERMINOLOGY   Knowledge of key electrical terminology is necessary to fully understand principles in electrical science. Conductors Conductors are materials with electrons that are loosely bound to their atoms, or materials that permit free motion of a large number of electrons. Atoms with only one valence electron, … [Read more...]

BASIC ELECTRICAL THEORY 1

 BASIC ELECTRICAL THEORY 1  next> ATOM AND ITS FORCES What is electricity? Electricity is defined as “the flow of electrons through simple materials and devices” or “that force which moves electrons.” Scientists think electricity is produced by very tiny particles called electrons and protons. These particles are too small to be seen, but exist as subatomic … [Read more...]

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