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Day 269: JEE Mains Physics

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

  1. Question 1

    Dual Nature of Radiation and Matter. Asked once: 1 Feb 2023 (same type asked 6 times) See all 6 of this type

    12
    A proton moving with one tenth of velocity of light has a certain de Broglie wavelength of λ\lambda. An alpha particle having certain kinetic energy has the same de Broglie wavelength λ\lambda. The ratio of kinetic energy of proton and that of alpha particle is:

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  2. Question 2

    Oscillations. Asked once: 25 Jan 2023 (same type asked 6 times) See all 6 of this type

    20
    TT is the time period of simple pendulum on the earth's surface. Its time Period becomes xTxT when taken to a height RR (equal to earth's radius) above the earth's surface. Then, the value of xx will be:

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  3. Question 3

    Thermodynamics. Asked once: 28 Jul 2022 (same type asked 6 times) See all 6 of this type

    7
    A Carnot engine has efficiency of 50%50\%. If the temperature of sink is reduced by 40∘C40^{\circ}C, its efficiency increases by 30%30\%. The temperature of the source will be:

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  4. Question 4

    Motion in a Straight Line. Asked once: 4 Apr 2024 (same type asked 5 times) See all 5 of this type

    14
    A body travels 102.5 m102.5\text{ }m in nth n^{\text{th~}} second and 115.0 m115.0\text{ }m in (n+2)th (n + 2)^{\text{th~}} second. The acceleration is :

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  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 25 Jan 2023 (same type asked 5 times) See all 5 of this type

    18
    Electron beam used in an electron microscope, when accelerated by a voltage of 20kV20kV, has a deBroglie wavelength of λ0\lambda_{0}. If the voltage is increased to 40kV40kV, then the de-Broglie wavelength associated with the electron beam would be:

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