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






2. Negative charge of electricity






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






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






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






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






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






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






9. A unit of power.






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






11. The rotating member of an electrical machine.






12. A measuring device.






13. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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






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






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






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






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






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






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






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






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






24. Total and complete opposition to the flow of electrons






25. Opposition to current flow






26. 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.

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






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






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






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






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






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






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






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






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






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






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






38. 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.






39. 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.






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






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






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






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






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






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

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






47. 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.






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






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






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