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Are both rheostat and thermostat same ? Where are they used ?
asked Nov 30, 2015 in Electrical by transformer | 132 views

1 Answer

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One can take it this way that Rheostat sets you the status of Resistance where Thermostat tells you the status of resistance. Rheostat is a variable resistance device where one can increase or decrease the resistance as he wants to do.

Coming to Thermostat : The physics behind is - If tempareture of a material increased so as its resistance. Now resistance we can measure easily with a simple analog or digital meters and or multimeters. Now if you know the certain resistance value of a thermostat at a given tempareture, then during hot or cold the hike or drop of resistance will tell you the status of tempareture.

All we need to have a tempareture-resistance characteristics of the material we are using in a thermostat, and before use it calibrate once and scale it properly for better results with next to zero error.
answered Dec 7, 2015 by Arka