the resistance of a semiconductor decreases as the temperature increases. The te

Question

the resistance of a semiconductor decreases as the temperature increases. The temperature dependence of the resistance is an exponential over a limited temperature range: R = R0ebeta/T The classic variable volume thermometer is shown on the right. As the liquid in the thermometer heats up, it expands. The gas pressure above the liquid is essentially zero, and the liquid height h is a linear function of temperature. In today's lab we will use this type of thermometer to calibrate our variable pressure and variable resistance thermometers. To explore how different physical properties change with temperature. To practice making and analyzing graphs. To practice "linearizing" a data set that follows an exponential dependence. The data shown in the table to the right represents the resistance (R) of a thermistor in Ohm s as a function of temperature (T) in Kelvin. Make a graph of the natural logarithm of the resistance, ln(R) versus the inverse of the temperature, 1/T and determine the constants R0 and beta in equation 3. Hint: refer to Equation 5 near the end of your lab.

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