Electrical Engineering

electrical banner 3Electrical engineers, abbreviated as EE, design, develop, test, and supervise the manufacturing of electrical equipment.  Electrical & Electronic engineers design things such as power systems, electronics/microelectronics, signal processing, instrumentation & control systems, computers, and computer networks.


  • ELEC - electric
  • ELECDR - electric drive
  • EMD - electric motor driven
  • EPS - electric power supply
  • ELECT - electrical
  • ER - electrical resistance
  • ELEK - electronic
  • ELECTC - electronic control
  • EI - electronic interface
  • ES - electronic switch
  • EVM - electronic voltmeter
  • ELMCH - electromechanical
  • EE - Electrical Engineer


Electrical Engineering Subtopics

Electrical Engineering


Electric Wire Materials

  • Copper electrical wire - Copper (Cu) is considered the standard in wiring. Most homes and appliances use copper for two reasons. It is easy to mold or bend and it is a good conductor. Copper is rather easy to come by but not as easy as other conductor metals.
  • Aluminum electrical wire - Aluminum (Al) is also easy to mold and bend but less of a conductor than copper. If you decide to use aluminum wire that will carry the same amount of electricity as a copper wire, the wire needs to have a larger diameter. Since aluminum is more abundant than copper, it makes it the cheaper of the two.
  • Silver electrical wire - Silver (Ag) is the best conductor of electricity for high temperatures. However, it is hard to bend and expensive.
  • Alloys in electrical wire - In manufacturing, an alloy may sometimes be used. Aluminum and copper can be used for cost and conductibility.


Electrical Engineering Associations


Professional Engineering Licence


Electrical Terms


  • Actuator  -  A device used to open, close, or control valves.
  • Alternating current (AC)  -  An electric current that reverses its direction over and over.
  • Alternator  -  A device which converts mechanical energy into electrical energy used to maintain a charge in a car battery.
  • American Wire Gauge  -  A measure of wire thickness.
  • Ammeter  -  An instrument for measuring the flow of electrical current in amperes.
  • Amp  -  Amp is a unit of current.
  • Amphere  -  A unit of measure for the flow of current in a circuit.
  • Analog  -  Analog or analogue is a continuous electronic variable signal caring information.
  • Analog switch  -  A switching device able to rought analog signals.


  • Battery  -  A storage device for energy and then discharge.  Batteries can be rated by their energy capacity.
  • Breaker  -  An automatic switching device that disconnect the power to a circut when the current or heat exceeds a certain level for a certain amount of time.
  • Broadband  -  A transmission medium with enough bandwith to cary multiple channels, data, video and voice at the same time.


  • Cell  -  Cells generate energy through a thermal process, chemical or optical.
  • Circuit  -  A closed loop through which electricity can flow.  The flow of current is from positive to negative. 
  • Conductor  -  A material through which heat passes.
  • Contacts  -  Components
  • Coulomb's law  -  The magnitude of the electrostatic force between two electric charges.
  • Current  -  The rate of flow of electricity in a circuit, measured in amperes.


  • Diode  -  A device allowing the current to flow as a one-way switch only and restricting the current from flowing in the opposite direction.  Diodes allow the current to flow when the anode is positive and the cathode is negative.
  • Direct current (DC)  -  An electric current that flows in only one direction.


  • Electrolyte  -  A compound that produces ions when dissolved in water and having either a positive of negative charge.


  • Frequency  -  The number of cycles per sec, measured in Hertz.
  • Fuse  -  An safety device that removes electrical current from a circuit when the current is two high.


  • Generator  -  A mechanical device that produces electrical energy from mechanical energy.


  • Hertz  -  A measure of frequency or cps (cycles per second).
  • Horsepower  -  A measure of power or the rate of doing work.






  • Magnetic field  -  Magnetic fields never cross, never start or stop, where the field is strongest lines bunch togeather and can be seen clearly seen in the real world.
  • Magnetic flux (\(\phi\) or \(\phi_B\))  -  The number of magnetic field lines passing through a given closed surface.
  • Magnetic switch  -  Depending on the switch configuration for on and off, the switch is activated when the magnetic field is detected.


  • Normally closed (NC)  -  The circuit is closed when the switch is not open.
  • Normally open (NO)  -  The circuit is open when the switch is not operated.


  • Ohm  -  A unit of resistance.
  • Ohm's law  -  The relationships between power, voltage, current, and resistance.


  • Primary cell  -  A dry cell and not a rechargeable cell.  A chemical reaction between electrodes and electrolites causing a permanent change.
  • Parrallel circuit  -  The parts are arranged in branches each going their own way.
  • Power  -  The rate of doing work and is measured by the amount of foot pounds of work done in a particular unit of time.



  • Rectifier  -  An electrical device that convert alternating current (AC) to direct current (DC).
  • Resistance  -  The ability to resist or prevent the flow of current.
  • Resistor  -  They resist the flow of electricity.


  • Secondary cell  -  A wet cell and is a rechargable cell.  Generates a current through a secondary cell in the opposite direction of the first cell.
  • Semiconductor  -  A type of material that has an electronic resistance between the metal and the resistance insulator.
  • Series circuit  -  The parts are connected end to end.
  • Shunt  -  Also called a shunt resistor, is a conductor joining two points in a circuit used to limit the speed of the current.
  • Solenoid  -  A device made of a coil of wire.  When current is introduced a magnetic field is formed around the coil (electrical energy) and the plunger is pulled in (mechanical work).  When the current is removed the plunger is released.
  • Switch  -  A device that opens and closes electrical circuit.


  • Thermal insulator  -  Does not conduct heat readily and is used for either heat conservation or personnel protection.
  • Transformer  -  A device that uses electromagnetism to convert one current to another current.
  • Transducer  -  A voltage output device used for convert energy to another form.
  • Transmitter (TX)  -  A current output device used for communication electronic signals over a distance.
  • Tuner  -  A circuit that can pick signals from a frequency from a group of signals of different frequencies.



  • Volt  -  A unit of electrical pressure.
  • Voltage  -  The amount of pressure that will cause one ampere of current in one ohm of resistance.
  • Voltage drop  -  The electricity between the meter and where it is be used.






Display #
API RP 500, Section 6
API RP 500, Section 9
Area Classification Drawing
Control Narrative
Resistors in Parallel
Resistors in Series
Temperature Coefficient of Resistance
Voltage Divider
Voltage Drop

Tags: Equations for Electrical