Test your basic knowledge |

Electrical Components

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 measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






2. The output that is produced when one or more inputs are present.






3. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






4. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






5. The magnitude and time phase of a quantity - represented by a plotted line.






6. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






7. A region of space that surrounds a moving electrical charge or a magnetic pole - in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.






8. MA; One thousandth of an amp.






9. A silicone semiconductor that maintains a fixed voltage in a circuit.






10. A sensor or switch with the ability to detect it's relationship to a metal target without making physical contact.






11. Variable Frequency.






12. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






13. An electrical circuit that increases the power - voltage or current of an applied signal.






14. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






15. A solid-state switching device used in switching AC wave forms.






16. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






17. Pressure that is less than atmospheric pressure.






18. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.






19. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






20. A highly accurate bridge configuration that is used to measure three-wire RTD thermometers.






21. One millionth of a meter.






22. A temperature scale. Also known as centigrade. Sea level water will freeze at 0






23. SI; The standard metric system of units.






24. One millionth of a volt.






25. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






26. A full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.






27. UL; ~LINK~






28. NEMA;






29. The interaction of magnetism and electrical current.






30. The standard that is used to make comparison measurements or calibrations.






31. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






32. The amount of time it takes for a device to react to an input signal.






33. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






34. Response to the change in the level of the input signal.






35. Radio Frequency Interference.






36. A unit of electrical current named after French physicist Andr






37. The maximum temperature at which a device can be safely operated.






38. When there is current through a semiconductor p-n junction it is the resistance of a forward-biased junction.






39. The moving of electricity or heat through a conductor.






40. A small current leaking from an output device in the off state caused by semiconductor characteristics.






41. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






42. EPA; ~LINK~






43. Pounds per square inch differential. The difference in pressure between two points.






44. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






45. The act of the opening of an electrical circuit.






46. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






47. A tube - pipe or trough that carries and protects electric wiring.






48. The quality of having the ability to emit light when struck by electrons or another form of radiation.






49. A meter used to measure electrical resistance in units of ohms.






50. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.