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






2. 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.






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






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






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






6. One- thousandth of a ampere






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






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






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






10. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






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






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






13. The rotating member of an electrical machine.






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






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






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






17. Total and complete opposition to the flow of electrons






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






19. An instrument for measuring electric current






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






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






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






23. Opposition to current flow






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






25. The unit of Electro- Motive Force






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






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






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






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






30. 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.






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






32. 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.






33. 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.






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






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






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






37. Negative charge of electricity






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






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






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






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






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






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






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






45. A measuring device.






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

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47. A generator that produces alternating current.






48. One million ohms.






49. 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.






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