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KVPY SA Exam 19-Nov-2017 Question Paper
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© examsnet.com
Question : 67
Total: 80
Two different liquids of same mass are kept in two identical vessels, which are placed in a freezer thatextracts heat from them at the same rate causing each liquid to transform into a solid. The schematic figurebelow shows the temperature T vs time t plot for the two materials. We denote the specific heat of metrials inthe liquid (solid) states to be
C
L
1
(
C
S
1
)
and
C
L
2
(
C
S
2
)
respectively.
C
L
1
<
C
L
2
and
C
S
1
<
C
S
2
C
L
1
>
C
L
2
and
C
S
1
>
C
S
2
C
L
1
>
C
L
2
and
C
S
1
<
C
S
2
C
L
1
<
C
L
2
and
C
S
1
>
C
S
2
Validate
Solution:
Let Refrigerater extract Q joul/per second
Q.t ⇒ ms (T
f
– T)
Higher the specific heat, Higher the slope
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