A thermistor may be assumed to have a linear temperature resistancė dver a range. The variation in resistance is – 0.05°C rise of temperature. The thermistor has a resistance of 1000 2 at 20°C. Calculate the value of its resistance at 25°C. Supposing this thermistor is used in series with a copper coil, what is the value of the resistance of copper coil if the resistance at 20° C and 25°C is the same for the series connected circuit comprising of coil and the thermistor? The resistance temperature co- efficient of copper may be assumed as 0.004 °C.

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7. A thermistor may be assumed to have a linear temperature resistance over a limited temperature
range. The variation in resistance is - 0.05°C rise of temperature. The thermistor has a resistance
of 1000 2 at 20°C. Calculate the value of its resistance at 25°C. Supposing this thermistor is used
in series with a copper coil, what is the value of the resistance of copper coil if the resistance at 20°
C and 25°C is the same for the series connected circuit comprising of coil and the thermistor? The
resistance temperature co- efficient of copper may be assumed as 0.004°C.
Transcribed Image Text:7. A thermistor may be assumed to have a linear temperature resistance over a limited temperature range. The variation in resistance is - 0.05°C rise of temperature. The thermistor has a resistance of 1000 2 at 20°C. Calculate the value of its resistance at 25°C. Supposing this thermistor is used in series with a copper coil, what is the value of the resistance of copper coil if the resistance at 20° C and 25°C is the same for the series connected circuit comprising of coil and the thermistor? The resistance temperature co- efficient of copper may be assumed as 0.004°C.
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