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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. Negative charge of electricity






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






3. Total and complete opposition to the flow of electrons






4. 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.






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






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






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






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






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






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






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






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






13. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.






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






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






16. A generator that produces alternating current.






17. One millionth of a volt.






18. The rotating member of an electrical machine.






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






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






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






22. One millionth of an ampere.






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






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






25. An instrument for measuring electric current






26. 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.






27. 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.






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






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






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






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






32. One millionth of an ohm.






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






34. 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.






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






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






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






38. 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.






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






40. Opposition to current flow






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. A rate of movement of electrons through a conductor.






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






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






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






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






48. 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.






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

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