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

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

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

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

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

6. Meter used to measure resistance in an electrical circuit.

7. 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.

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

9. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.

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

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

12. 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.

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

14. 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)

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

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

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

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

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

20. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.

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

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

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

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

25. 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.

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

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

28. In a battery - the electrode which takes up the electrons returning from the external circuit.

29. Negative charge of electricity

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

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

32. 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.

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

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

35. One millionth of an ampere.

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

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

38. Opposition to current flow

39. One millionth of an ohm.

40. 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.

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

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

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

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

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

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

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

48. 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.

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

50. A generator that produces alternating current.