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Properties of Set Operation

The temperatu...

Question

The temperature-time variation graphs, as obtained by four students $A, B, C$ and $D$ are as shown. The graph, likely to be correct is that of student

A

A

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B

B

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C

C

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D

D

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Solution

The correct option is C $D$
According to Newton's law of cooling: $\frac{d Q}{d t} = - K (Δ T)$
Thus, $T$ Vs $t$ graph must be continuously decreasing curve as shown by student D.

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