1
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
$$4\pi mJ$$
2
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Water is flowing continuously from a tap having an internal diameter $$8 \times {10^{ - 3}}\,\,m.$$ The water velocity as it leaves the tap is $$0.4\,\,m{s^{ - 1}}$$ . The diameter of the water stream at a distance $$2 \times {10^{ - 1}}\,\,m$$ below the tap is close to :
A
$$7.5 \times {10^{ - 3}}m$$
B
$$9.6 \times {10^{ - 3}}m$$
C
$$3.6 \times {10^{ - 3}}m$$
D
$$5.0 \times {10^{ - 3}}m$$
3
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
A ball is made of a material of density $$\rho$$ where $${\rho _{oil}}\, < \rho < {\rho _{water}}$$ with $${\rho _{oil}}$$ and $${\rho _{water}}$$ representing the densities of oil and water, respectively. The oil and water are immiscible. If the above ball is in equilibrium in a mixture of this oil and water, which of the following pictures represents its equilibrium position?
A
B
C
D
4
AIEEE 2009
MCQ (Single Correct Answer)
+4
-1
Two wires are made of the same material and have the same volume. However wire $$1$$ has cross-sectional area $$A$$ and wire $$2$$ has cross-sectional area $$3A.$$ If the length of wire $$1$$ increases by $$\Delta x$$ on applying force $$F,$$ how much force is needed to stretch wire $$2$$ by the same amount?
A
$$4F$$
B
$$6F$$
C
$$9F$$
D
$$F$$
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