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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. A generator that produces alternating current.






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






3. One millionth of a volt.






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






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






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






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






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






11. The unit of Electro- Motive Force






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






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






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






15. 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.






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






17. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






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






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






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






21. Smallest part a substance can physically divided into composed of 2 or more atoms.






22. Coil connected to the source of power on a transformer.






23. 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.






24. A measuring device.






25. 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.






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. One millionth of an ampere.






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






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






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






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






32. One million ohms.






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






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






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






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






37. 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.






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






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






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






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






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






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






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






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






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






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






49. 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.






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