1
AIPMT 2014
+4
-1
Copper of fixed volume V is drawn into wire of length $$l$$. When this wire is subjected to a constant force F, the extension produced in the wire is $$\Delta$$$$l$$. Which of the following graphs is a straight line ?
A
$$\Delta$$$$l$$ versus 1/$$l$$
B
$$\Delta$$$$l$$ versus $$l$$2
C
$$\Delta$$$$l$$ versus 1/$$l$$2
D
$$\Delta$$$$l$$ versus $$l$$
2
AIPMT 2014
+4
-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
A
energy = 4VT $$\left( {{1 \over r} - {1 \over R}} \right)$$ is released.
B
energy = 3VT$$\left( {{1 \over r} + {1 \over R}} \right)$$ is absorbed.
C
energy = 3VT$$\left( {{1 \over r} - {1 \over R}} \right)$$ is released
D
energy is neither released nor absorbed.
3
AIPMT 2014
+4
-1
Steam at 100oC is passed into 20 g 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]
A
24 g
B
31.5 g
C
42.5 g
D
22.5 g
4
AIPMT 2014
+4
-1
Certain quantity of water cools from 70oC to 60oC in the first 5 minutes and to 54oC in the next 5 minutes. The temperature of the surroundings is
A
45oC
B
20oC
C
42oC
D
10oC
EXAM MAP
Medical
NEET