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Day 105: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked 2 times: 2021 Paper 1*, 27 Jul 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    27
    A mass 0.9 kg0.9\text{ }kg, attached to a horizontal spring, executes SHM with an amplitude A1A_{1}. When this mass passes through its mean position, then a smaller mass of 124 g124\text{ }g is placed over it and both masses move together with amplitude A2A_{2}. If the ratio A1A2\frac{A_{1}}{A_{2}} is αα−1\frac{\alpha}{\alpha - 1}, then the value of α\alpha will be

  2. Question 2

    Kinetic Theory. Asked 2 times: 25 Jun 2022, 26 Jul 2022 See all 2 times it was asked

    102
    A gas has nn degrees of freedom. The ratio of specific heat of gas at constant volume to the specific heat of gas at constant pressure will be:

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  3. Question 3

    Waves. Asked 2 times: 29 Jun 2022*, 26 Jul 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    103
    A transverse wave is represented by y=2sin⁡(ωt−kx) cmy = 2\sin(\omega t - kx)\ cm. The value of wavelength (in cmcm ) for which the wave velocity becomes equal to the maximum particle velocity, will be;

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  4. Question 4

    Electrostatics. Asked 2 times: 2021 Paper 16*, 25 Jul 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    118
    Two parallel plate capacitors of capacity CC and 3C3C are connected in parallel combination and charged to a potential difference 18 V18\text{ }V. The battery is then disconnected and the space between the plates of the capacitor of capacity CC is completely filled with a material of dielectric constant 9. The final potential difference across the combination of capacitors will be ____\_\_\_\_ VV

  5. Question 5

    System of Particles and Rotational Motion. Asked 2 times: 2021 Paper 9*, 26 Jun 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    5
    A thin circular ring of mass MM and radius RR is rotating with a constant angular velocity 2rads−12rads^{- 1} in a horizontal plane about an axis vertical to its plane and passing through the center of the ring. If two objects each of mass mm be attached gently to the opposite ends of a diameter of ring, the ring will then rotate with an angular velocity (in rads  −1\ ^{- 1} ).

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