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






2. An alternating current which current cycle begins earlier than its voltage cycle.






3. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.






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






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






6. 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.






7. Negative charge of electricity






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






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






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






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






12. A complete sequence of events - as an alternating- current cycle.






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






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






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






16. One millionth of an ohm.






17. The rotating member of an electrical machine.






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






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






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






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






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






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






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






25. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






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






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






28. A material which can be magnetized - principally iron.






29. 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.






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

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






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






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






34. Total and complete opposition to the flow of electrons






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






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






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






38. 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.






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






40. A unit of power.






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






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






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






44. 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.






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






46. One- thousandth of volt.






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






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






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






50. 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.