5. It is required to design a resistance thermometer (RTD) using a nickel alloy wire of 0.02 mm(1 mark)UTMOUTM(2 marks)a. Calculate the length of the wire should be?UTMdiameter. The thermometer resistance at 0°C is to be 100 0. Take for nickel value of resistivity,OUTM6. A copper - constantan thermocouple was found to have linear calibration between 0°C and400°C with emf at maximum temperature (reference junction temperature 0°C) equal toUTp, as 8.7 x 106 n cm at 0°C and the temperature coefficient of resistance, a, 0.0068 °C .OUTMUTMOUTMa. Determine the correction which must be made to the indicated emf if the coldOUTb. Determine the value of resistance at steam point.UTMOUTM(1 mark)UTMUTMb. If the indicated emf is 8.92 mV in the thermocouple circuit, determine thetemperature of the hot junction. (The cold junction temperature is 25°C).OUTMUTN20.68mV.UTMjunction temperature is 25°C.(2 marks)UTMUTMUTMUTMOUTMOUTMUTM

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5. It is required to design a resistance thermometer (RTD) using a nickel alloy wire of 0.02 mm (2 marks) OUTM UTM a. Calculate the length of the wire should be? UTM diameter. The thermometer resistance at o°C is to be 100 0. Take for nickel value of resistivity, p, as 8.7 x 10° a cm at 0°C and the temperature coefficient of resistance, a, 0.0068 °c. (1 mark) OUT b. Determine the value of resistance at steam point. U

5. It is required to design a resistance thermometer (RTD) using a nickel alloy wire of 0.02 mm (2 marks) OUTM UTM a. Calculate the length of the wire should be? UTM diameter. The thermometer resistance at o°C is to be 100 0. Take for nickel value of resistivity, p, as 8.7 x 10° a cm at 0°C and the temperature coefficient of resistance, a, 0.0068 °c. (1 mark) OUT b. Determine the value of resistance at steam point. U

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter1: Atomic Structure

Section: Chapter Questions

Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?

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