Q.

Which of the following statements is correct

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a

Total heat of the universe is conserved

b

A thermometer should have a small thermal capacity

c

Atmospheric temperature in cities on the sea - coast changes very much

d

Constant volume gas thermometer can be used to measure the temperature of insects

answer is A.

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Detailed Solution

Q = m.s.Δ θ

⇒ Δ θ = Q / ms

So if Q is small , for an appreciable change in temperature 'ms' should be small

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