1

JEE Main 2021 (Online) 27th July Morning Shift

Numerical

+4

-1

A stone of mass 20 g is projected from a rubber catapult of length 0.1 m and area of cross section 10

(Young's modulus of rubber = 0.5 $$\times$$ 10

^{$$-$$6}m^{2}stretched by an amount 0.04 m. The velocity of the projected stone is ______________ m/s.(Young's modulus of rubber = 0.5 $$\times$$ 10

^{9}N/m^{2})Your input ____

2

JEE Main 2021 (Online) 22th July Evening Shift

Numerical

+4

-1

The area of cross-section of a railway track is 0.01 m

(Young's modulus of material of track is 10

^{2}. The temperature variation is 10$$^\circ$$C. Coefficient of liner expansion of material of track is 10^{$$-$$5}/$$^\circ$$C. The energy stored per meter in the track is ____________ J/m.(Young's modulus of material of track is 10

^{11}Nm^{$$-$$2})Your input ____

3

JEE Main 2021 (Online) 18th March Evening Shift

Numerical

+4

-1

Consider a water tank as shown in the figure. It's cross-sectional area is 0.4 m

The value of v, to the nearest integer, is ___________. [Take value of g to be 10 ms

^{2}. The tank has an opening B near the bottom whose cross-section area is 1 cm^{2}. A load of 24 kg is applied on the water at the top when the height of the water level is 40 cm above the bottom, the velocity of water coming out the opening B is v ms^{-1}.The value of v, to the nearest integer, is ___________. [Take value of g to be 10 ms

^{-2}]Your input ____

4

JEE Main 2021 (Online) 17th March Evening Shift

Numerical

+4

-1

Suppose you have taken a dilute solution of oleic acid in such a way that its concentration becomes 0.01 cm

^{3}of oleic acid per cm^{3}of the solution. Then you make a thin film of this solution (monomolecular thickness) of area 4 cm^{2}by considering 100 spherical drops of radius $${\left( {{3 \over {40\pi }}} \right)^{{1 \over 3}}} \times {10^{ - 3}}$$ cm. Then the thickness of oleic acid layer will be x $$\times$$ 10^{$$-$$14}m. Where x is ____________.Your input ____

Questions Asked from Properties of Matter (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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