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Day 290: JEE Mains Physics

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

  1. Question 1

    Units and Measurements. Asked once: 24 Jan 2025 (same type asked 4 times) See all 4 of this type

    4
    For an experimental expression y=32.3×112527.4y =\frac{32.3 \times 1125}{27.4}, where all the digits are significant. Then to report the value of yy we should write :-

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  2. Question 2

    Gravitation. Asked once: 2021 Paper 25 (same type asked 4 times) See all 4 of this type

    16
    A planet revolving in elliptical orbit has: A. a constant velocity of revolution. B. has the least velocity when it is nearest to the sun. C. its areal velocity is directly proportional to its velocity. D. areal velocity is inversely proportional to its velocity. E. to follow a trajectory such that the areal velocity is constant. Choose the correct answer from the options given below:

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  3. Question 3

    Motion in a Plane. Asked once: 1 Feb 2023 (same type asked 4 times) See all 4 of this type

    1
    A child stands on the edge of the cliff 10 m10\text{ }m above the ground and throws a stone horizontally with an initial speed of 5 ms−15{\text{ }ms}^{- 1}. Neglecting the air resistance, the speed with which the stone hits the ground will be ms−1ms^{- 1} (given, g=10 ms−2g = 10{\text{ }ms}^{- 2} ).

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  4. Question 4

    Current Electricity. Asked once: 29 Jan 2024 (same type asked 4 times) See all 4 of this type

    2
    The electric current through a wire varies with time as I=I0+βtI =I_{0}+ \beta t. where I0=20 AI_{0}= 20\text{ }A and β=3 A/s\beta = 3\text{ }A/s. The amount of electric charge crossed through a section of the wire in 20 s20\text{ }s is :

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  5. Question 5

    Laws of Motion. Asked once: 2021 Paper 25 (same type asked 4 times) See all 4 of this type

    24
    As shown in the figure, a block of mass 3 kg\sqrt{3}\text{ }kg is kept on a horizontal rough surface of coefficient of friction 133\frac{1}{3\sqrt{3}}. The critical force to be applied on the vertical surface as shown at an angle 60∘60^{\circ} with horizontal such that it does not move, will be 3x3x. The value of xx will be
    [g=10 m/s2;sin⁡60∘=32;cos⁡60∘=12]\left\lbrack g = 10\text{ }m/s^{2};\sin60^{\circ}=\frac{\sqrt{3}}{2};\cos60^{\circ}=\frac{1}{2} \right\rbrack