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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 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.






2. A measuring device.






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

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






5. A unit of power.






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






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






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






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






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






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






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






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






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






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






16. The unit of Electro- Motive Force






17. 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.






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






19. 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.






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






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






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






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






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






25. A generator that produces alternating current.






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






27. 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.






28. 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.






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






30. 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.






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






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






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






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






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






36. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






37. 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.






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






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






40. One millionth of a volt.






41. One millionth of an ohm.






42. The rotating member of an electrical machine.






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






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






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






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






47. 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.






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






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






50. 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