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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 number of cycles per second. Example: 60 cycles per second alternating current.






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






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






4. One millionth of an ohm.






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






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






7. 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.






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






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






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






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






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






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






14. Total and complete opposition to the flow of electrons






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






16. 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






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






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






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






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






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






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






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






24. 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.






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






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






27. One- thousandth of a ampere






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






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






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






31. An instrument for measuring electric current






32. 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.






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






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






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






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






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






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






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






40. 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.






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






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






43. 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)






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






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






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






47. 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.






48. The unit of Electro- Motive Force






49. A unit of power.






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