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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 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)






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






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






4. 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.






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






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






7. 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.






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






9. The rotating member of an electrical machine.






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






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






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






13. Total and complete opposition to the flow of electrons






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






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






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






17. 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.






18. The difference between the electrical condition of one point in an electric circuit and that of another point which tends to cause current to flow between two points. Measured in volts.






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






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






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






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






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

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






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






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






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






28. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






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






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






31. 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.






32. An instrument for measuring electric current






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






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






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






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






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






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






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






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






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






42. 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.






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






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






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






46. One millionth of an ampere.






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






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






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






Can you answer 50 questions in 15 minutes?



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