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Day 477: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Solids. Asked once: 6 Apr 2023

    112
    A metal block of mass mm is suspended from a rigid support through a metal wire of diameter 14 mm14\text{ }mm. The tensile stress developed in the wire under equilibrium state is 7×105Nm−27 \times10^{5}Nm^{- 2}. The value of mass mm is____ kgkg. (Take, g=9.8 ms−2g = 9.8{\text{ }ms}^{- 2} and π=227\pi =\frac{22}{7} )

  2. Question 2

    Motion in a Plane. Asked once: 8 Apr 2024

    9
    A clock has 75 cm,60 cm75\text{ }cm,60\text{ }cm long second hand and minute hand respectively. In 30 minutes, duration the tip of second hand will travel xx distance more than the tip of minute hand. The value of xx in meter is nearly (Take π=3.14\pi = 3.14 ) :

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  3. Question 3

    Motion in a Straight Line. Asked once: 3 Apr 2025

    7
    Which of the following curves possibly represent one-dimensional motion of a particle ? (a) (b) (c) (d) Choose the correct answer from the options given below:

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  4. Question 4

    Moving Charges and Magnetism. Asked once: 6 Apr 2024

    18
    An element Δl=Δxi^\Delta l = \Delta x\widehat{i} is placed at the origin and carries a large current =10 A= 10\text{ }A. The magnetic field on the yy-axis at a distance of 0.5 m0.5\text{ }m from the elements Δx\Delta x of 1 cm1\text{ }cm length is:

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  5. Question 5

    Nuclei. Asked once: 4 Apr 2024

    115
    The disintegration energy QQ for the nuclear fission of  235U→ 140Ce+ 94Zr+n\ ^{235}U \rightarrow\ ^{140}Ce +\ ^{94}Zr + n is ____\_\_\_\_ MeVMeV. Given atomic masses of
     235U:235.0439u; 140Ce;139.9054u 94Zr:93.9063u;n:1.0086u\begin{matrix} & \ ^{235}U:235.0439u;\ ^{140}Ce;139.9054u \\ & \ ^{94}Zr:93.9063u;n:1.0086u \end{matrix}
    Value of c2=931MeV/uc^{2}= 931MeV/u.