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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. Opposition to current flow






2. One millionth of a volt.






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






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






5. One million ohms.






6. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






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






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






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






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






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






12. 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.






13. 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)






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






15. 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.






16. The rotating member of an electrical machine.






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






18. Total and complete opposition to the flow of electrons






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






20. One- thousandth of a ampere






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






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






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

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24. One millionth of an ampere.






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






26. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours






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






28. 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.






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






30. 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.






31. 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.






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






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






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






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






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






38. One millionth of an ohm.






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






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






41. Negative charge of electricity






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






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






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






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






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






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






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






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






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