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






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






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






4. One millionth of an ampere.






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






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






8. A measuring device.






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






10. A unit of power.






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






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






13. 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.






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






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






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






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






18. 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.






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






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






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






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

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23. An instrument for measuring electric current






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






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






26. 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






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






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






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






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






31. One- thousandth of a ampere






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






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






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






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






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






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






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






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






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






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






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






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






44. Total and complete opposition to the flow of electrons






45. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.






46. 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.






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






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






49. The unit of Electro- Motive Force






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