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






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






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






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






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






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






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






9. A unit of power.






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






11. 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.






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






13. One- thousandth of a ampere






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






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






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






17. 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.






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






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






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






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






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






23. 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.






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






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






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






27. One millionth of a volt.






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






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






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






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






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






33. 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.






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






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






36. 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)






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






38. One millionth of an ohm.






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






40. 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.






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






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






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






44. An alternating current which current cycle begins earlier than its voltage cycle.






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






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






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






48. The unit of Electro- Motive Force






49. An instrument for measuring electric current






50. 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.