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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 unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






2. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.






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






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






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






6. 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.






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






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






9. The liquid solution (sometime a paste) in which the electrodes are placed.






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






11. One- thousandth of volt.






12. One million ohms.






13. The space around a magnet in which the magnetic force is felt.






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






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


16. One- thousandth of a ampere






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






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






19. 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.






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






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






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






23. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






24. One millionth of a volt.






25. One millionth of an ampere.






26. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.






27. A unit of POWER. 1 kilowatt = 1 -000 watts






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






29. 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.






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






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






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






33. A rod or strip composed of two metals having different rates or coefficients of expansion. Upon being heated - it bends in a direction which causes the material with the greater rate of expansion to be on the outside.






34. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours






35. A material that has many free electrons thus allowing electric current to flow through it easily.






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






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






38. The center portion of an atom which has a positive electrical charge.






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






40. The property of a material that opposes the flow of current.






41. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.






42. A circuit with two or more paths for the current to take.






43. A circuit with more than one path. Current branches to flow in every available path.






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






45. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)






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






47. A unit of power.






48. Occurs when a stream of electrons are caused to move through a conductor.






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






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