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A thermocouple thermometer is connected to a…

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PHYSICS

A thermocouple thermometer is connected to a millivoltmeter which can read up to 10mV. When one junction is in ice at 0°C and the other is steam at 100°C, the millivoltmeter reads 4mV. What is the maximum temperature which this arrangement can measure?

  • A. 100°C
  • B. 248°C
  • C. 250°C
  • D. 350°C
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QUICK ANSWER…

C

DETAILS…

To properly understand this question, we need a sketch…

A thermocouple thermometer is connected to

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is incorrect.
  3. C is correct.
  4. D is not the correct answer.

HELPFUL TIPS…

You may please note these/this:

  • Problems like this are usually resolved by sketching the scale and tracing the upper and lower fixed points.

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/culled from 2019 JAMB-UTME physics question 26/

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