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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 rotating member of an electrical machine.






2. 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.






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






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






5. Total and complete opposition to the flow of electrons






6. One- thousandth of a ampere






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






8. A generator that produces alternating current.






9. 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.






10. One million ohms.






11. 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.






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






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






14. One millionth of a volt.






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






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






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






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






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






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






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






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


23. 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






24. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.






25. A measuring device.






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






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






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






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






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






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






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






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






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






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






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






37. A unit of power.






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






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






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






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






42. 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.






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






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






45. Negative charge of electricity






46. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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






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






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