Thermal Physics> In a thermocouple thermometer connected t...

In a thermocouple thermometer connected to a millivoltmeter, which can read up to 10mv. One junction is in ice at 0°c and the other in steam at 100°c, the millimeter reads 4.0mv. What is the maximum temperature, which the arrangement can measure.

Ogbuzuru Emmanuel , 7 Years ago

Grade 10

1 Answers

Susmita

In a thermocouple,emf

$E=at+bt^2$

t is temperature difference between cold and hot junctions.

Here no information about a,b is given.So we have to take the linear term only .

E=at and keep the cold reservoir fixed at 0 degree centigrade.

Given E=4 mV when t=100^°C.

So a=E/t=0.04 mV/^°C.

Maximum value of t will correspond to maximum emf or E=10mV.

So t=E/a=10/.04=250^°C.

Please approve if helped.

Last Activity: 7 Years ago

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Thermal Physics> In a thermocouple thermometer connected t...

In a thermocouple thermometer connected to a millivoltmeter, which can read up to 10mv. One junction is in ice at 0°c and the other in steam at 100°c, the millimeter reads 4.0mv. What is the maximum temperature, which the arrangement can measure.

Ogbuzuru Emmanuel , 7 Years ago

Susmita

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