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Day 227: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 1 Feb 2023 (same type asked 2 times) See all 2 of this type

    106
    Choose the correct length (L) versus square of time period (T2)\left( T^{2} \right) graph for a simple pendulum executing simple harmonic motion.

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  2. Question 2

    Ray Optics. Asked once: 21 Jan 2026 S2 (same type asked 2 times) See all 2 of this type

    20
    As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface. If refractive index of the material of prism is 2\sqrt{2}, the angle θ\theta of prism is.

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  3. Question 3

    Ray Optics. Asked once: 29 Jun 2022 (same type asked 2 times) See all 2 of this type

    29
    A parallel beam of light is allowed to fall on a transparent spherical globe of diameter 30 cm30\text{ }cm and refractive index 1.5. The distance from the centre of the globe at which the beam of light can converge is ____\_\_\_\_ mmmm.

  4. Question 4

    Gravitation. Asked once: 9 Apr 2024 (same type asked 2 times) See all 2 of this type

    12
    An astronaut takes a ball of mass mm from earth to space. He throws the ball into a circular orbit about earth at an altitude of 318.5 km318.5\text{ }km. From earth's surface to the orbit, the change in total mechanical energy of the ball is xGMem21Rex\frac{GM_{e}m}{21R_{e}}. The value of xx is (take Re=6370 kmR_{e}= 6370\text{ }km ):

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  5. Question 5

    Motion in a Plane. Asked once: 27 Jan 2024 (same type asked 2 times) See all 2 of this type

    21
    A particle starts from origin at t=0t= 0 with a velocity 5i^m/s5\widehat{i}m/s and moves in x−yx - y plane under action of a force which produces a constant acceleration of (3i^+2j^)m/s2(3\widehat{i}+ 2\widehat{j})m/s^{2}. If the xx-coordinate of the particle at that instant is 84 m84\text{ }m, then the speed of the particle at this time is αm/s\sqrt{\alpha}m/s. The value of α\alpha is ________ .