1
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A load of mass M kg is suspended from a steel wire of length 2m and radius 1.0 mm in Searle's apparatus experiment. The increase in length produced in the wire is 4.0 mm. Now the load is fully immersed in a liquid of relative density 2. The relative density of the material of load is 8.

The new value of increase in length of the steel wire is:
A
5.0 mm
B
zero
C
3.0 mm
D
4.0 mm
2
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A long cylindrical vessel is half filled with a liquid. When the vessel is rotated about its own vertical axis, the liquid rises up near the wall. If the radius of vessel is 5 cm and its rotational speed is 2 rotations per second, then the difference in the heights between the centre and the sides, in cm, will be :
A
2.0
B
1.2
C
0.1
D
0.4
3
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume, with time, at a constant rate. The graph that correctly depicts the time dependence of pressure inside the bubble is given by :
A
JEE Main 2019 (Online) 12th January Evening Slot Physics - Properties of Matter Question 191 English Option 1
B
JEE Main 2019 (Online) 12th January Evening Slot Physics - Properties of Matter Question 191 English Option 2
C
JEE Main 2019 (Online) 12th January Evening Slot Physics - Properties of Matter Question 191 English Option 3
D
JEE Main 2019 (Online) 12th January Evening Slot Physics - Properties of Matter Question 191 English Option 4
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A liquid of density $$\rho $$ is coming out of a hose pipe of radius a with horizontal speed $$\upsilon $$ and hits a mesh. 50% of the liquid passes through the mesh unaffected. 25% looses all of its momentum and 25% comes back with the same speed. The resultant pressure on the mesh will be :
A
$${3 \over 4}\rho {v^2}$$
B
$${1 \over 4}\rho {v^2}$$
C
$${1 \over 2}\rho {v^2}$$
D
$$\rho {v^2}$$
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