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Day 135: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Mechanical Properties of Fluids. This type asked 2 times: 25 Jun 2022, 29 Jan 2023. This one: 29 Jan 2023 See all 2 of this type

    120
    A metal block of base area 0.20 m20.20{\text{ }m}^{2} is placed on a table, as shown in figure. A liquid film of thickness 0.25 mm0.25\text{ }mm is inserted between the block and the table. The block is pushed by a horizontal force of 0.1 N0.1\text{ }N and moves with a constant speed. If the viscosity of the liquid is 5.0×10−3Pl5.0 \times10^{- 3}Pl, the speed of block is_____ ×10−3 m/s\times10^{- 3}\text{ }m/s.

  2. Question 2

    Motion in a Plane. This type asked 2 times: 25 Jun 2022, 29 Jan 2023. This one: 29 Jan 2023 See all 2 of this type

    14
    A car is moving on a horizontal curved road with radius 50 m50\text{ }m. The approximate maximum speed of car will be, if friction between tyres and road is 0.34. [take g=10 ms−2g = 10{\text{ }ms}^{- 2} ]

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  3. Question 3

    Oscillations. This type asked 2 times: 2021 Paper 25, 25 Jan 2023. This one: 25 Jan 2023 See all 2 of this type

    17
    Assume that the earth is a solid sphere of uniform density and a tunnel is dug along its diameter throughout the earth. It is found that when a particle is released in this tunnel, it executes a simple harmonic motion. The mass of the particle is 100 g100\text{ }g. The time period of the motion of the particle will be (approximately) (Take g=10 m s−2g = 10\text{ }m{\text{ }s}^{- 2}, radius of earth =6400 km= 6400\text{ }km )

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  4. Question 4

    Magnetism and Matter. This type asked 2 times: 29 Jun 2022, 29 Jul 2022. This one: 29 Jul 2022 See all 2 of this type

    108
    The vertical component of the earth's magnetic field is 6×10−5 T6 \times10^{- 5}\text{ }T at any place where the angle of dip is 37∘37^{\circ}. The earth's resultant magnetic field at that place will be (Given tan⁡37∘=34\tan37^{\circ}=\frac{3}{4} )

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  5. Question 5

    Oscillations. This type asked 2 times: 2021 Paper 23, 29 Jul 2022. This one: 29 Jul 2022 See all 2 of this type

    117
    The metallic bob of simple pendulum has the relative density 5 . The time period of this pendulum is 10 s10\text{ }s. If the metallic bob is immersed in water, then the new time period becomes 5xs5\sqrt{x}s. The value of xx will be