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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 generator that produces alternating current.






2. 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.






3. The area surrounding a magnet in which magnetic properties are exhibited






4. One millionth of an ohm.






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






6. 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.






7. 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)






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






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






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






11. Shows relationship between Current - Voltage - Wattage and Resistance.

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






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






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






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






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






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






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






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






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






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






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






23. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.






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






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






26. The dissimilar metals which are placed in an electrolyte to form a cell.






27. Iron and certain alloys of iron which are magnetized by artificial means.






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






29. One- thousandth of volt.






30. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.






31. The unit of Electro- Motive Force






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






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






34. 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.






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






36. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.






37. Total and complete opposition to the flow of electrons






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






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






40. Opposition to current flow






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






42. A unit of power.






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






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

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45. One millionth of an ampere.






46. A cell which is composed of certain materials which are used up during the process of delivering electric current.






47. Negative charge of electricity






48. 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.






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






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