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Day 305: JEE Mains Physics

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

  1. Question 1

    Thermodynamics. Asked once: 24 Jan 2023 (same type asked 3 times) See all 3 of this type

    12
    1 g1\text{ }g of a liquid is converted to vapour at 3×105 Pa3 \times10^{5}\text{ }Pa pressure. If 10%10\% of the heat supplied is used for increasing the volume by 1600 cm31600{\text{ }cm}^{3} during this phase change, then the increase in internal energy in the process will be:

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  2. Question 2

    System of Particles and Rotational Motion. Asked once: 22 Jan 2025 (same type asked 3 times) See all 3 of this type

    12
    A uniform circular disc of radius ' RR ' and mass ' MM ' is rotating about an axis perpendicular to its plane and passing through its centre. A small circular part of radius R/2R/2 is removed from the original disc as shown in the figure. Find the moment of inertia of the remaining part of the original disc about the axis as given above.

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  3. Question 3

    Dual Nature of Radiation and Matter. Asked once: 2021 Paper 24 (same type asked 3 times) See all 3 of this type

    3
    The temperature of an ideal gas in 3-dimensions is 300 K300\text{ }K. The corresponding de-Broglie wavelength of the electron approximately at 300 K300\text{ }K, is: [me=\left\lbrack m_{e}= \right. mass of electron =9×10−31 kg= 9 \times10^{- 31}\text{ }kg h=h = Planck constant =6.6×10−34Js= 6.6 \times10^{- 34}Js kB=k_{B}= Boltzmann constant =1.38×10−23JK−1= 1.38 \times10^{- 23}JK^{- 1} ]

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  4. Question 4

    Work, Energy and Power. Asked once: 30 Jan 2023 (same type asked 3 times) See all 3 of this type

    11
    As per the given figure, a small ball PP slides down the quadrant of a circle and hits the other ball QQ of equal mass which is initially at rest. Neglecting the effect of friction and assume the collision to be elastic, the velocity of ball QQ after collision will be:

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  5. Question 5

    Work, Energy and Power. Asked once: 28 Jun 2022 (same type asked 3 times) See all 3 of this type

    26
    A man of 60 kg60\text{ }kg is running on the road and suddenly jumps into a stationary trolley car of mass 120 kg120\text{ }kg. Then the trolley car starts moving with velocity 2 ms−12{\text{ }ms}^{- 1}. The velocity of the running man was ____\_\_\_\_ ms−1ms^{- 1} when he jumps into the car.