1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A uniform cylinder of length $$L$$ and mass $$M$$ having cross-sectional area $$A$$ is suspended, with its length vertical, from a fixed point by a mass-less spring such that it is half submerged in a liquid of density $$\sigma $$ at equilibrium position. The extension $${x_0}$$ of the spring when it is in equilibrium is:
A
$${{Mg} \over k}$$
B
$${{Mg} \over k}\left( {1 - {{LA\sigma } \over M}} \right)$$
C
$${{Mg} \over k}\left( {1 - {{LA\sigma } \over {2M}}} \right)$$
D
$${{Mg} \over k}\left( {1 + {{LA\sigma } \over M}} \right)$$
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Assume that a drop of liquid evaporates by decreases in its surface energy, so that its temperature remains unchanged. What should be the minimum radius of the drop for this to be possible ? The surface tension is $$T,$$ density of liquid is $$\rho $$ and $$L$$ is its latent heat of vaporization.
A
$$\rho L/T$$
B
$$\sqrt {T/\rho L} $$
C
$$T/\rho L$$
D
$$2T/\rho L$$
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of $$1.5 \times {10^{ - 2}}\,\,N$$ (see figure). The length of the slider is $$30$$ $$cm$$ and its weight negligible. The surface tension of the liquid film is AIEEE 2012 Physics - Properties of Matter Question 185 English
A
$$0.0125\,\,N{m^{ - 1}}$$
B
$$0.1\,\,N{m^{ - 1}}$$
C
$$0.05\,\,N{m^{ - 1}}$$
D
$$0.025\,\,N{m^{ - 1}}$$
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Work done in increasing the size of a soap bubble from a radius of $$3$$ $$cm$$ to $$5$$ $$cm$$ is nearly (Surface tension of soap solution $$ = 0.03N{m^{ - 1}},$$
A
$$0.2\pi mJ$$
B
$$2\pi mJ$$
C
$$0.4\pi mJ$$
D
$$4\pi mJ$$
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