Flag Thermal Physics> In a thermocouple thermometer connected t...
question mark

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 , 6 Years ago
Grade 10
anser 1 Answers
Susmita

Last Activity: 6 Years ago

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.

Provide a better Answer & Earn Cool Goodies

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free