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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 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.






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






3. Coil connected to the source of power on a transformer.






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






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






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






7. 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






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






9. One millionth of an ohm.






10. 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.






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






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






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






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






15. Opposition to current flow






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






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






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






19. 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.






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






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






22. 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)






23. Negative charge of electricity






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






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






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






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






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






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






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






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

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






33. One- thousandth of a ampere






34. The unit of Electro- Motive Force






35. 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.






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






37. 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.






38. 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.






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






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






41. The rotating member of an electrical machine.






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






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






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






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






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






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






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






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






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







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