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state similarities and differences between the laboratory thermometer and the clinical thermometer

Abhishek Singh Tomar 1st Dec, 2020

Similarities between Clinical Thermometer and  a laboratory thermometer

  • Both are made of glass and consist of long narrow glass tube.
  • At one end both of them have a bulb.
  • Bulbs of both the thermometers consist of mercury
  • Celsius scale is present in both the thermometer

Differences between Clinical Thermometer and

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A platinum resistance thermometer has a resistance of 2 ohm at 0 C and 3 ohm at 100 C. What will be the temperature when resistance indicates 5 ohm?

JAYA KARTHIKA RS 30th Sep, 2020

Hello,

Solution :

The resistance and temperature relation is given by ,

Rt = R0 ( 1+ αt )

By electric resistance thermometer.

R0 - resistance at 0° C

R0= 2 ohm

R100 = 3 ohm

So,

2 =R0(1+α*0)

3 = R0 (1+ α*100)

By Cross multiplication,

2+ 200α= 3

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