Q1. A 10kO NTC thermistor has a B value of 3455 between the temperature range of...

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Q1. A 10kO NTC thermistor has a B value of 3455 between the temperature range of 25°C and 100 'C. Calculate its resistive value at 25 "C and again at 100 C. Draw two point characteristics graph of thermistor. 02. Please briefly explain thermo-resistive temperature measuring devices and their principle of operation. 03. A thermistor temperature sensor placed in a bridge circuit has been put in a biomedical application to measure the temperature of a neonates body temperature which provides feedback to keep the neonates body temperature close to 37°C. The following bridge circuit shows the thermistor represented as R1. If R3 and R4 are fixed at 1k ohm, and the calibrated resistance at TO 0C, R2- 500 ohm, with a supply voltage of 10V, and a - 0.00395 "C, what is the measured bridge voltage Va for a temperature of 37 "C? Hint: From following equation we can find effect of temperature on resistance R = Ro (1 + aAT) R= resistance of the conductor at temp. t C) Re = resistance at the reference temp. a = temperature coefficient of resistance A= difference between operating and reference temp. Av Q1. A 10kO NTC thermistor has a B value of 3455 between the temperature range of 25°C and 100 'C. Calculate its resistive value at 25 "C and again at 100 C. Draw two point characteristics graph of thermistor. 02. Please briefly explain thermo-resistive temperature measuring devices and their principle of operation. 03. A thermistor temperature sensor placed in a bridge circuit has been put in a biomedical application to measure the temperature of a neonates body temperature which provides feedback to keep the neonates body temperature close to 37°C. The following bridge circuit shows the thermistor represented as R1. If R3 and R4 are fixed at 1k ohm, and the calibrated resistance at TO 0C, R2- 500 ohm, with a supply voltage of 10V, and a - 0.00395 "C, what is the measured bridge voltage Va for a temperature of 37 "C? Hint: From following equation we can find effect of temperature on resistance R = Ro (1 + aAT) R= resistance of the conductor at temp. t C) Re = resistance at the reference temp. a = temperature coefficient of resistance A= difference between operating and reference temp. Av