Test your basic knowledge |

Electronics

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. Light Emitting Diode






2. Current periodically reverses direction






3. An atom that does not release electrons under normal conditions.






4. Energy that exists because of position.






5. The transforming or transferring of energy.






6. The unit of measurement of electric resistance.






7. The smallest particle to which an element can be reduced and still retain its characteristics.






8. The unit of measurement of electric power.






9. Current flows in one direction only.






10. The capacity to do work.






11. The difference of electrical potential between to points on a circuit






12. A circuit that forms a direct path across a voltage source (with little or no resistance) so that a very high and possibly unsafe electric current flows.






13. The part of an electric system that shows whether the system is on or off or that a specific quantity is present.






14. Areas through which electrons move; designated as s - p - d - and f.






15. Alternating Current






16. Electric force - or pressure - that causes current to flow in a circuit.






17. The part of an electric system that affects what the system does; a switch to turn on and turn off a light is a type of control.






18. Current flow assumed to be in a direction from high charge concentration (+) to low charge concentration (-).






19. The part of an electric system that converts electric energy into another form of energy - such as an electric motor that converts electric energy into mechanical energy.






20. A charge on a material that is said to be either positive or negative.






21. The rate at which work is done.






22. The movement of electric charge; the flow of electrons through an electric circuit.






23. Current flow assumed to be in the direction of electron movement from a negative (-) potential to a positive (+) potential.






24. A material that has a value of electric resistance between that of a conductor and an insulator and is used to manufacture solid- state devices such as diodes and transistors.






25. A positively charged atom






26. Electrons located in the outer orbit of an atom that are easily removed and result in flow of electric current.






27. Electricity at rest caused by accumulation of either positive or negative electric charge.






28. An object which resists the flow of electricity.






29. The method by which loosely held atoms are bound together in metals.






30. A circuit that has a broken path so that no electric current can flow through it. A circuit with infinite resistance.






31. The space around a charged material in which the influence of the electric charge is experienced.






32. The unit of electric charge - which is the basic unit of measurement for current flow in an electric circuit.






33. A unit of electric charge that represents a large number of electrons. ~ 6.28 x 1018 electrons






34. A neutrally charged atom






35. Energy that exists because of movement.






36. Resistors are objects that resist flow. If a light bulb gets to much electricty it can burn out. In other terms - NOT GOOD!!






37. The pressure - or force - that causes electric current to flow.






38. A material that offers a high resistance to electric current flow.






39. A device that stores energy between a pair of conductors






40. (R) The opposition to the flow of electric current in a circuit; its unit of measurement is the ohm (O).






41. Do Opposites attract or move away from each other?






42. Something that can turn on or off the flow of electricty.






43. V= IR or Voltage is equal to current times resistance






44. A material that allows electric current to flow through it easily.






45. The unit of measurement of electric potential.






46. The path along which electrons travel around the nucleus of an atom.






47. The basic materials that make up all other materials; they exist by themselves (such as copper - hydrogen - carbon) or in combination with other elements (water is a combination of the elements hydrogen and oxygen).






48. A circuit that forms a complete path so that electric current can flow through it.






49. Electrons in the outer orbit of an atom.






50. An atomic particle said to have a negative (-) electric charge; electrons are the means by which the transfer of electric energy takes place.