Question

help please

Answer 1

@TuringTest @ash2326

Answer 2

@experimentX @physicsme

Answer 3

http://en.wikipedia.org/wiki/Thermocouple
"..consisting of two different conductors (usually metal alloys) that produce a voltage, proportional to a temperature difference,.."

Answer 4

The answer should be A.

Answer 5

it should be B as the metals should be different and so should be the temperature of the junctions..though i cant see any junction in your figure..

Answer 6

Ah...I misunderstood the correlation between the image and the table... Yep, B is correct in that it includes a dissimilar metal and the junction must be hotter than the voltmeter to obtain a valid reading.

Answer 7

BTW: The junction is in the image above the table...to the left.