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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. Negative charge of electricity






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






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






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






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






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






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






9. 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.






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






11. The unit of Electro- Motive Force






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






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






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






15. An instrument for measuring electric current






16. One- thousandth of volt.






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






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






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






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






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






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






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






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






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






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






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






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






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






30. A unit of power.






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






32. One millionth of an ohm.






33. 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.






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






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






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






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






38. 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.






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






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






41. One millionth of a volt.






42. A generator that produces alternating current.






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






44. 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)






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






46. 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.






47. 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.






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






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






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