engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Measurement of Temperature Thermistor
A thermistor may be assumed to have a linear temperature resistance over a limited temperature range. The variation in resistance is -0.02/°C rise in temperature. The thermistor has a nominal resistance of 1500 Ω at 25°c. Supposing this thermistor is used in series with a copper coil having resistance temperature co-efficient of 0.005/°C and nominal resistance Ro. If the resistance at 25°C and 50°C is the same for this series connected circuit comprising of coil and the thermistor, then the value of nominal resistance (Ro) of copper coil (at T = 25°C) is ________ (in kΩ).
Enter numerical value using the virtual keypad. Round off where necessary.