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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. 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.






2. The opposition to electrical flow.






3. The resistance to electrical current. Resistance is measured in ohms.






4. EPA; ~LINK~






5. A fluctuation in the intensity of a steady current.






6. Non-conducting material used to isolate and/or insulate energized electrical components.






7. Kw; One thousand watts.






8. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






9. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






10. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






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






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. FM; ~LINK~






14. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ






15. A connected path to earth or to a conductive body that has a reference potential to earth.






16. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






17. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






18. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






20. The adjustment of a display that results are zero on the display corresponding to a non-zero signal.






21. Symbol used to denote transmitter.






22. Resistance Temperature Detector.






23. Protective circuitry to guard against spikes that might be induced on the supply line.






24. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






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






26. The measure of the ability of a material or substance to carry electrical current.






27. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






28. Electric and magnetic force field that surrounds a moving electric charge.






29. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






30. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






31. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






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






33. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






34. An area in which combustible or flammable mixtures are or could be present.






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






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






37. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






38. IEEE;






39. The mechanism of a switch which operates the contacts.






40. The element inside a vacuum tube - incandescent lamp or other similar device.






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






42. -459.67






43. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






44. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






45. The range of voltage needed to maintain operation of a control or device.






46. UL; ~LINK~






47. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






48. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






49. 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(-).






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







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