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






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






3. One million ohms.






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






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






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






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






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






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






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






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

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






13. 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.






14. 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.






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






16. 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.






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






18. 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.






19. Several secondary cells connected together for either a greater voltage or current output.






20. A measuring device.






21. An instrument for measuring electric current






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






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






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






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






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






27. A generator that produces alternating current.






28. 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.






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






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






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






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






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






34. 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.






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






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






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






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






39. Opposition to current flow






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






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






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






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






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






45. One millionth of an ohm.






46. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






47. Meter used to measure resistance in an electrical circuit.






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






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






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