The resistance of a thermistor changes from 30k to 12k when the temperature changes from 20C to 70 C Calculate the sensitivity if resistance is taken.

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The resistance of a thermistor changes from 30k to 12k when the temperature changes from 20C to 70 C Calculate the sensitivity if resistance is taken as the output and give the unit. If the thermistor is part of a circuit with a 20k fixed resistor and a 6V power supply calculate the change in output voltage as measured across the fixed resistor. Calculate the sensitivity of the system now. If the resolution of the voltmeter is 0.01V, what is the smallest change in temperature which the system can detect?