AIPMT 2015 Cancelled Paper | Properties of Matter Question 47 | Physics

The two ends of a metal rod are maintained at temperatures 100^oC and 110^oC. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200^oC and 210^oC, the rate of heat flow will be

8.0 J/s

4.0 J/s

44.0 J/s

16.8 J/s

AIPMT 2014

MCQ (Single Correct Answer)

-1

A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

energy = 4VT $$\left( {{1 \over r} - {1 \over R}} \right)$$ is released.

energy = 3VT$$\left( {{1 \over r} + {1 \over R}} \right)$$ is absorbed.

energy = 3VT$$\left( {{1 \over r} - {1 \over R}} \right)$$ is released

energy is neither released nor absorbed.

AIPMT 2014

MCQ (Single Correct Answer)

-1

Steam at 100^oC is passed into 20 g of water at 10^oC. When water acquires a temperature of 80^oC, 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]

24 g

31.5 g

42.5 g

22.5 g

AIPMT 2014

MCQ (Single Correct Answer)

-1

Certain quantity of water cools from 70^oC to 60^oC in the first 5 minutes and to 54^oC in the next 5 minutes. The temperature of the surroundings is

45^oC

20^oC

42^oC

10^oC

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