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. A positively charged atom






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






3. The unit of measurement of electric power.






4. Light Emitting Diode






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






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






7. The capacity to do work.






8. Energy that exists because of movement.






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






10. The rate at which work is done.






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






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






13. The part of an electric system through which electrons travel from a source to a load - such as the electric wiring used in a building.






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






15. The transforming or transferring of energy.






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






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






18. The unit of measurement of electric potential.






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






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






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






22. The unit of measurement of electric resistance.






23. 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.






24. 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).






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






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






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






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






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






30. Electrons in the outer orbit of an atom.






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






32. An object which resists the flow of electricity.






33. Alternating Current






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






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






36. Energy that exists because of position.






37. 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.






38. 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.






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






40. The part of an electric system that supplies energy to other parts of the system - such as a battery that supplies energy for a flashlight.






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






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






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






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






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






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






47. 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.






48. A neutrally charged atom






49. Current flows in one direction only.






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