PYQ Vault
EbooksTutor

Day 335: JEE Mains Physics

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

  1. Question 1

    Units and Measurements. Asked once: 26 Jun 2022 (same type asked 7 times) See all 7 of this type

    1
    An expression for a dimensionless quantity PP is given by P=αβlog⁡e(ktβx)P =\frac{\alpha}{\beta}\log_{e}\left( \frac{kt}{\beta x} \right); where α\alpha and β\beta are constants, xx is distance; kk is Boltzmann constant and tt is the temperature. Then the dimensions of α\alpha will be :

    Tap an option to check your answer.

  2. Question 2

    Oscillations. Asked once: 31 Jan 2023 (same type asked 7 times) See all 7 of this type

    1
    The maximum potential energy of a block executing simple harmonic motion is 25 J25\text{ }J. A is amplitude of oscillation. At A/2A/2, the kinetic energy of the block is:

    Tap an option to check your answer.

  3. Question 3

    Nuclei. Asked once: 29 Jun 2022 (same type asked 7 times) See all 7 of this type

    118
    The half -life of a radioactive substance is 5 years. After xx years a given sample of the radioactive substance gets reduced to 6.25%6.25\% of its initial value. The value of xx is

  4. Question 4

    Thermodynamics. Asked once: 14 Jun 2022 (same type asked 7 times) See all 7 of this type

    95
    A Carnot engine take 5000kcal5000kcal of heat from a reservoir at 727∘C727^{\circ}C and gives heat to a sink at 127∘C127^{\circ}C. The work done by the engine is:

    Tap an option to check your answer.

  5. Question 5

    Mechanical Properties of Fluids. Asked once: 12 Apr 2023 (same type asked 6 times) See all 6 of this type

    29
    Glycerine of density 1.25×103 kg m−31.25 \times10^{3}\text{ }kg{\text{ }m}^{- 3} is flowing through the conical section of pipe. The area of cross-section of the pipe at its ends is 10 cm210{\text{ }cm}^{2} and 5 cm25{\text{ }cm}^{2} and pressure drop across its length is 3Nm−23Nm^{- 2}. The rate of flow of glycerine through the pipe is x×10−5 m3 s−1x \times10^{- 5}{\text{ }m}^{3}{\text{ }s}^{- 1}. The value of xx is___