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






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






3. A measuring device.






4. 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.






5. 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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6. 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.






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






8. Opposition to current flow






9. Total and complete opposition to the flow of electrons






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






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






12. Negative charge of electricity






13. 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.






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






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






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






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






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






19. 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.






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






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






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






23. A generator that produces alternating current.






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






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






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






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






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






29. 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.






30. One millionth of an ohm.






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






32. One millionth of an ampere.






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






34. 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.






35. One million ohms.






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






37. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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






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






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






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






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






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






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






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






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






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






48. 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)






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






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