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Day 570: JEE Mains Physics

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

  1. Question 1

    Laws of Motion. Asked once: 26 Jul 2022

    1
    Three masses M=100 kg, m1=10 kgM = 100\text{ }kg,{\text{ }m}_{1}= 10\text{ }kg and m2=20 kgm_{2}= 20\text{ }kg are arranged in a system as shown in figure. All the surfaces are frictionless and strings are inextensible and weightless. The pulleys are also weightless and frictionless. A force FF is applied on the system so that the mass m2m_{2} moves upward with an acceleration of 2 ms−22{\text{ }ms}^{- 2}. The value of FF is: (Take g=10 ms−2g = 10{\text{ }ms}^{- 2} )

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  2. Question 2

    Motion in a Plane. Asked once: 27 Jun 2022

    2
    A girl standing on road holds her umbrella at 45∘45^{\circ} with the vertical to keep the rain away. If she starts running without umbrella with a speed of 152kmh−115\sqrt{2}kmh^{- 1}, the rain drops hit her head vertically. The speed of rain drops with respect to the moving girl is:

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  3. Question 3

    Motion in a Straight Line. Asked once: 28 Jul 2022

    92
    At time t=0t = 0 a particle starts travelling from a height 7z^ cm7\widehat{z}\text{ }cm in a plane keeping zz coordinate constant. At any instant of time it's position along the xx and yy directions are defined as 3t3t and 5t35t^{3} respectively. At t=1 st = 1\text{ }s acceleration of the particle will be

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  4. Question 4

    Ray Optics. Asked once: 24 Jan 2023

    103
    When a beam of white light is allowed to pass through convex lens parallel to principal axis, the different colours of light converge at different point on the principle axis after refraction. This is called:

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  5. Question 5

    Semiconductor Electronics. Asked once: 9 Apr 2024

    110
    In the truth table of the above circuit the value of XX and YY are:

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