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CGPET 2017 Solved Paper
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© examsnet.com
Question : 8
Total: 150
A thermocouple produces a thermo-e.m.f. of
40
µ
V
∕
°
C
. A thermopile is made by using 150 such thermocouples. The temperatures of the two junctions are
20
°
C
and
40
°
C
. How much thermo-emf will be generated in the thermopile?
100
M
V
120
M
V
220
M
V
200
M
V
Validate
Solution:
Thermo-emf
=
40
µ
V
∕
°
C
Thermo-emf generated in the thermopile is
=
40
×
20
×
150
=
120000
=
120
M
V
© examsnet.com
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