Consider a bowl filled with water on whi...

Consider a bowl filled with water on which some black pepper powder have been sprinkled uniformly. Now a drop of liquid soap is added at the centre of the surface of water. The picture of the surface immediately after this will look like

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A rectangular tank filled with some liquid is accelerated along a horizontal surface at (40)/(3)ms^(-2) . Inside the liquid, a laser pointer is fixed a the centre of the tank which shoots a thin laser beam in the vertically upward direction. If after refraction from the liquid surface, the laser beam moves along the surface of the liquid, then what is the refractive index of the liquid ?

A vessel filled with air under pressure p_0 contains a soap bubble of diameter d . The air pressure having been reduced isothermally n-fold , the bubble diameter increased eta-fold . Find the surface tension of the soap water solution.

A vessel filled with air under pressue p_(0) contains a soap bubble of diameter d . The air presuue have been reduced n -fold, and the bubbled diameter increased r -fold is othermally. Find the surface tension of the soap water solution.

In a village, farmers started cultivating crops all around a lake which was always filled with water. They added lot of materials W to the soil in their fields to increase the yield of crops. Soon they found that the whole surface of water in the lake was covered with a green layer made up of tiny organisms X. After some time, the fish present in the lake started dying in large numbers they could not get sufficient Y due to a process Z which had occurred in lake water and drained out all the Y present in the water of lake. (a) What do you think materials W are ? (b) Name (i) X, and (ii) Y. (c ) What is the process Z known as ? (d) What happens during the process Z which uses up all the Y present in lake water ? (e) What does this example tell us about the use of materials like W ?

KVPY PREVIOUS YEAR-KVPY-All Questions

If some charge is given to a solid metallic sphere, the field inside r...
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Using dimensional analysis the resistivity in terms of fundamental con...
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Consider a bowl filled with water on which some black pepper powder ha...
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It was found that the refractive index of material of a certain prism ...
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Two circularly shaped linear polarisers are placed coaxially. The tran...
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An electron in an electron microscope with initial velocity v(0)hati e...
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A bird sitting on a single high tension wire does not get electrocuted...
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A positive charge q is placed at the center of a neutral hollow cylind...
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A transverse wave of frequency 500 Hz and speed 100 m/s is traveling i...
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A thin piece of thermal conductor of constant thermal conductivity ins...
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Which of the following plots represents schematically the dependence o...
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On a pulley of mass M hangs a rope with two masses m(1) and m(2) (m(1)...
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Two satellites S(1) and S(2) are revolving around a planet in the oppo...
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A rectangular region of dimensions wxxl (w ltlt l) has a constant magn...
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Force vecF applied on a body is written as vecF=(hatn.hatF)" "hatn+ve...
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A particle of mass m moves around the origin in a potential (1)/(2)mom...
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Two bottles A and B have radii R(A) and R(B) and heights h(A) and h(B)...
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The number of gas molecules striking per second per square meter of th...
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One end of a rod of length L=1 m is fixed to a point on the circumfere...
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One mole of an ideal monatomic gas undergoes the following four revers...
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