Athermistor is a device that can measure temperature with great accuracy. the principle is simple; the resistance of a semiconductor is measured and the temperature is then estimated based on knowledge of the temperature dependence of the resistivity of the semiconductor. consider a thermistor which is made of a pure (intrinsic) semiconductor. at 0°c a resistance of 10,000 sn is measured. at 100°c, the resistance is 420 q. if the resistance is 2000 q at tı, what is tı? [hint: assume constant electron and hole mobility over the above temperature range] (а) 15°c (b) 43°c** (c) 82°c (d) 66°c