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Test on Thermal Properties of Matter

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Question 1

If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously will be

Question 2

To demonstrate the phenomenon of interference we require two sources which emit radiation of

Question 3

A liquid in a beaker has temperature θ (t) at time t and θ₀ is temperature of surroundings, then according to Newton’s law of cooling the correct graph between log_e (θ - θ₀) and t is

Question 4

A gaseous mixture consists of 16 g of helium and 16 g of oxygen. The ratio

of the mixture is

Question 5

The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by

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Mar 28JEE & BITSAT