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






3. 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.






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






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






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






7. 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






8. 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.






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






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






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






12. 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.






13. Total and complete opposition to the flow of electrons






14. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.

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






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






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






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

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19. 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.






20. One- thousandth of volt.






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






22. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)






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






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






25. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.






26. One millionth of an ampere.






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






28. A measuring device.






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






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






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






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






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






34. 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.






35. A unit of power.






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






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






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






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






40. Negative charge of electricity






41. Opposition to current flow






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






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






44. The unit of Electro- Motive Force






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






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






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






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






49. The rotating member of an electrical machine.






50. 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)