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






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






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






4. A rate of movement of electrons through a conductor.






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






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






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






8. 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)






9. 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.






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






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






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






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






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






15. A unit of power.






16. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source






17. One millionth of an ampere.






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






19. 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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20. 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.






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






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






23. One millionth of an ohm.






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






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






26. 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.






27. An instrument for measuring electric current






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






29. One- thousandth of a ampere






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






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






32. 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.






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






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






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






36. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.






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






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






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






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

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






42. A generator that produces alternating current.






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






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






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






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






47. 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.






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






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






50. One million ohms.