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






2. One million ohms.






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






4. The unit of Electro- Motive Force






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






6. 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.






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






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






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






10. 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.






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

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






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

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






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






16. One millionth of a volt.






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






18. An instrument for measuring electric current






19. 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.






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






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






22. 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.






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






24. 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.






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






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






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






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






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






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






31. One- thousandth of a ampere






32. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.






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






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






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






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






37. The property of a material that opposes the flow of current.






38. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






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






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






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






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






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






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






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






46. 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)






47. 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.






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






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






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