# Experimental Physics [closed]

A heater and thermocouple are used to measure and control the temp. T of a sample at $T_{0}=250^{o}C$. A feedback circuit supplies power P to the heater according to the equation $P=P_{0}+G(T_{0}-T)-D \frac{dT}{dt}$ with appropriately tuned values of the coefficients G and D. In order to maintain temperature stability in the presence of an external heat perturbation which causes small but rapid fluctuations of temperature , which factor that i have to control...?

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Hello S.Pal & welcome to Physics.SE. Here, we don't support that ask users to provide an answer (or choice). Please have a look at our homework policy before asking such questions. :) – Ϛѓăʑɏ βµԂԃϔ Oct 7 '12 at 16:08

## closed as too localized by David Zaslavsky♦Oct 7 '12 at 16:45

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