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Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10−4 × t2) mV.
The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?
  • a)
    105°C
  • b)
    700°C
  • c)
    157.5°C
  • d)
    1700°C
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Most of the times to determine the temperature in an electric furnace...

Given Data:
- Formula for e.m.f.: e.m.f. = (0.2t - 5 x 10^-4 x t^2) mV
- Thermocouple reads e.m.f. 105 mV in the blast furnace

Calculating the Temperature:
- Substitute the given e.m.f. value into the formula: 105 = 0.2t - 5 x 10^-4 x t^2
- Rearrange the equation: 5 x 10^-4 x t^2 - 0.2t + 105 = 0
- Use the quadratic formula to solve for t: t = [0.2 +/- sqrt((-0.2)^2 - 4 x 5 x 10^-4 x 105)] / 2 x 5 x 10^-4
- Calculate the values of t and choose the appropriate value based on the context.

Answer:
- The temperature of the blast furnace is calculated to be approximately 700°C.
Free Test
Community Answer
Most of the times to determine the temperature in an electric furnace...
At t = 0, e.m.f. = 0
At t = 100, e.m.f. = (20 − 5 × 10−4 × 104) mV
= 15 mV
∴ rise in 100°C corresponds to e.m.f. = 15 mV
∴ 105 mV e.m.f. corresponds to rise in temperature 700°C
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Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10−4 × t2) mV.The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?a)105°Cb)700°Cc)157.5°Cd)1700°CCorrect answer is option 'B'. Can you explain this answer?
Question Description
Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10−4 × t2) mV.The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?a)105°Cb)700°Cc)157.5°Cd)1700°CCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10−4 × t2) mV.The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?a)105°Cb)700°Cc)157.5°Cd)1700°CCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10−4 × t2) mV.The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?a)105°Cb)700°Cc)157.5°Cd)1700°CCorrect answer is option 'B'. Can you explain this answer?.
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