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






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






3. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.






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






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






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






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






8. A complete sequence of events - as an alternating- current cycle.






9. An instrument for measuring electric current






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

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






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






13. 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)






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






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






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






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






18. 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






19. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






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






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






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






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






24. Total and complete opposition to the flow of electrons






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






26. The rotating member of an electrical machine.






27. One million ohms.






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






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






30. A generator that produces alternating current.






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






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






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






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






35. 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.






36. 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.






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






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






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






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






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






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






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






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






45. 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.






46. 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.






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






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






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






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