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Question

The emf in a thermoelectric circuit with one junction at 0 and the other at toC is given by E=at+bt2. the neutral temperature is

A
2ba
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B
ab
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C
ab
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D
a2b
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Solution

The correct option is B a2b
Given that,
E=at+bt2
at neutral temperature,
dEdt=0
so ddt[at+bt2]=a+2btn=0
tn=a2b Hence correct option is D

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