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Basic Electricity Vocab

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The dissimilar metals which are placed in an electrolyte to form a cell.






2. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.


3. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.






4. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






5. A circuit in which there is resistance (load) connected both in series and parallel.






6. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






7. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.






8. Opposition to current flow






9. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.


10. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.






11. An instrument for measuring electric current






12. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






13. Lines representing the direction of the magnetic force in a magnetic field.






14. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).






15. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.






16. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






17. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.






18. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.






19. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.






20. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






21. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






22. A generator that produces alternating current.






23. A material with few free electrons. A structure or material used to prevent the passage of current.






24. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.






25. A measuring device.






26. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






27. In a battery - the electrode which takes up the electrons returning from the external circuit.






28. One million ohms.






29. Smallest part a substance can physically divided into composed of 2 or more atoms.






30. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.






31. A rate of movement of electrons through a conductor.






32. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).






33. The number of cycles per second. Example: 60 cycles per second alternating current.






34. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






35. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






36. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






37. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






38. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.






39. One millionth of an ohm.






40. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.






41. One millionth of an ampere.






42. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.






43. A device used to change the voltage of an alternating current circuit.






44. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






45. Several secondary cells connected together for either a greater voltage or current output.






46. The condition where the free electrons are caused to move in the same direction along or through a conductor.






47. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






48. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.






49. Hardened steel which has been magnetized artificially and which retains its magnetic properties






50. The unit of Electro- Motive Force