MHT CET 2026 Physics question
An ordinary body cools from to in 't' minutes. The temperature of the body after next 't' minutes is (Assume Newton's law of cooling and room temperature as )
Answer: (B)
Solution
By Newton's law of cooling, in equal time intervals the excess temperature over the surroundings falls by the same factor (exponential decay). Initially the excess is ; after minutes it is , so the factor per interval is .
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