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Basic Electricity Vocab

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 unit of power; equal to 550 foot- pounds per second of approximately 746 watts.

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

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

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

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

6. 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.

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

8. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.

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

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

11. One- thousandth of volt.

12. A device used to change the voltage of an alternating current circuit.

13. 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.

14. A generator that produces alternating current.

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

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

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

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

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

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

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

22. 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

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

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

25. Total and complete opposition to the flow of electrons

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

27. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.

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

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

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

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

32. 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)

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

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

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

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

37. 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.

38. An instrument for measuring electric current

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

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

41. 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.

42. Negative charge of electricity

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

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

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

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

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

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

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

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