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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. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.






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

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3. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






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






5. 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.






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






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






8. 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.






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






10. Single POSITIVE electrical charge - located in the middle of an atom.






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






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






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






14. A circuit with only one path for current to flow. There are no branches.






15. 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.






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






17. The moving part of a dynamo or motor consisting of coils of wire around an iron core.






18. 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.






19. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






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






21. Positive charge of electricity. Located in the nucleus of the atom.






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






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






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






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






26. Meter used to measure resistance in an electrical circuit.






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






28. A unit of power.






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






30. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)






31. An alternating current which current cycle begins later that its voltage cycle.






32. One- thousandth of a ampere






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






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






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






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






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






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






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






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






41. A generator that produces alternating current.






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






43. 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.






44. A resistor designed so that its resistance is readily adjusted.






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






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






47. One millionth of an ampere.






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






49. An instrument for measuring electric current






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