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NEET 2020 Revision: Thermal Properties of Matter - 2
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Question 1
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be:-
Question 2
Steam at 100oC is passed into 20g of water at 10oC. When water acquires a temperature of 80oC, the mass of water present will be:
[ Take specific heat of water = 1 cal g–1 oC–1 and latent heat of steam = 540 cal g–1]
[ Take specific heat of water = 1 cal g–1 oC–1 and latent heat of steam = 540 cal g–1]
Question 3
Certain quantity of water cools from 700C to 600C in the first 5 minutes and to 540C in the next 5 minutes. The temperature of the surroundings is;
Question 4
Consider two rods X and Y of same lengths having area of cross sections as 
respectively and with respective temperatures at the ends of each rods be T1 and T2. At what condition will the rate of flow of heat between X and Y be the same?
respectively and with respective temperatures at the ends of each rods be T1 and T2. At what condition will the rate of flow of heat between X and Y be the same? Question 5
Fire feels hot over the top at the same distance than on the sides.
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Mar 3NEET & AIIMS
