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






2. The difference in potential measured between two points caused by resistance or impedance.






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






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






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






6. An arrangement of any of various conductors through which electric current can flow from a supply current.






7. A variable resistor.






8. A controller whose action is either fully on or off.






9. 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(-).






10. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.






11. Normally Open.






12. Pressure that is less than atmospheric pressure.






13. Symbol used for wye configuration for three phase electrical connections.






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






15. One millionth of a meter.






16. Symbol used to denote transformer.






17. See; 'Maximum Power Rating'.






18. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






19. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






20. -459.67






21. The maximum watts that a device can safely handle.






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






23. The interaction of magnetism and electrical current.






24. Radio Frequency Interference.






25. The delayed period of time when outputs are turned off when power is initially applied.






26. The amount of power that is consumed and converted to heat.






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






28. Electrical energy produced by the action of heat.






29. See; 'Proximity Sensor'.






30. Symbol used to denote transmitter.






31. One millionth of an amp.






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






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






34. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






35. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






36. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






37. The rate of transfer of energy.






38. A hypothetical nuclear of a quark plus an antiproton.






39. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.






40. (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'






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






42. That part of a circuit which is physically interconnected.






43. 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.'






44. One thousandth of an inch.






45. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






46. EPA; ~LINK~






47. IBEW;






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






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






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