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Day 224: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 2021 Paper 14 (same type asked 2 times) See all 2 of this type

    8
    Two springs having constant, kk and 4k4k are connected in series and then connected to 2 masses, 200gm200gm and 800gm800gm at each end. Find angular frequency of their oscillation if k=20 N/mk = 20\text{ }N/m.

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  2. Question 2

    Units and Measurements. Asked once: 6 Apr 2024 (same type asked 2 times) See all 2 of this type

    1
    To find the spring constant (k)(k) of a spring experimentally, a student commits 2%2\% positive error in the measurement of time and 1%1\% negative error in measurement of mass. The percentage error in determining value of kk is:

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  3. Question 3

    Waves. Asked once: 2021 Paper 26 (same type asked 2 times) See all 2 of this type

    1
    A tuning fork AA of unknown frequency produces 5 beats/s with a fork of known frequency 340 HZHZ. When fork A filed, the beat frequency decreases to 2 beats/s. What is the frequency of fork A?

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  4. Question 4

    Waves. Asked once: 31 Jan 2023 (same type asked 2 times) See all 2 of this type

    104
    For a solid rod, the Young's modulus of elasticity is 3.2×1011Nm−23.2 \times10^{11}Nm^{- 2} and density is 8×103 kg m−38 \times10^{3}\text{ }kg{\text{ }m}^{- 3}. The velocity of longitudinal wave in the rod will be.

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  5. Question 5

    System of Particles and Rotational Motion. Asked once: 2021 Paper 24 (same type asked 2 times) See all 2 of this type

    28
    A 2 kg2\text{ }kg steel rod of length 0.6 m0.6\text{ }m is clamped on a table vertically at its lower end and is free to rotate in vertical plane. The upper end is pushed so that the rod falls under gravity, Ignoring the friction due to clamping at its lower end, the speed of the free end of rod when it passes through its lowest position is ____\_\_\_\_ ms−1ms^{- 1}. (Take  g=10 ms−2)\left. \ g = 10{\text{ }ms}^{- 2} \right)