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Electrical Components
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Electrical Components
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25 Questions

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

2. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.

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

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

5. Symbol used to denote transformer.

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

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

8. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.

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

10. Electrical energy produced by the action of heat.

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

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

13. 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.

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

15. Ultra High Frequency

16. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.

17. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.

18. Electric current passing through an electrolyte which produces chemical changes in it.

19. One millionth of an amp.

20. Normally Closed.

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

22. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.

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

24. A meter used to measure units of volts.

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

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