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






2. A measuring device.






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






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






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






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






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






8. Negative charge of electricity






9. 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)






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






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






12. An instrument for measuring electric current






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






14. 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.






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. The area surrounding a magnet in which magnetic properties are exhibited






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






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






19. 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.






20. One millionth of an ohm.






21. 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.






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






23. One millionth of a volt.






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






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






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






27. 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.






28. One millionth of an ampere.






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






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






31. Total and complete opposition to the flow of electrons






32. 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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33. 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.






34. One million ohms.






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






36. Positive charge of electricity. Located in the nucleus of the atom.






37. A unit of power.






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






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






40. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






41. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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42. Opposition to current flow






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






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






45. 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.






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






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






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






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






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