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Day 571: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. Asked once: 28 Jul 2022

    30
    Four identical discs each of mass ' MM ' and diameter ' aa ' are arranged in a small plane as shown in figure. If the moment of inertia of the system about OO′OO^{'} is x4Ma2\frac{x}{4}Ma^{2}. Then, the value of xx will be

  2. Question 2

    Thermodynamics. Asked once: 2021 Paper 10

    3
    For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where γ\gamma is the ratio of specific heats):

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  3. Question 3

    Units and Measurements. Asked once: 2021 Paper 26

    11
    If ' CC ' and ' VV ' represent capacity and voltage respectively then what are the dimensions of λ\lambda where C/V=λC/V =\lambda ?

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  4. Question 4

    Work, Energy and Power. Asked once: 2021 Paper 24

    30
    An engine is attached to a wagon through a shock absorber of length 1.5 m1.5\text{ }m. The system with a total mass of 40,000 kg40,000\text{ }kg is moving with a speed of 72kmh−172kmh^{- 1} when the brakes are applied to bring it to rest. In the process of the system being brought to rest, the spring of the shock absorber gets compressed by 1.0 m1.0\text{ }m. If 90%90\% of energy of the wagon is lost due to friction, the spring constant is ____\_\_\_\_ ×105 N/m\times10^{5}\text{ }N/m.

  5. Question 5

    Current Electricity. Asked once: 8 Apr 2024

    6
    In the given circuit, the terminal potential difference of the cell is:

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