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Day 533: JEE Mains Physics

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

  1. Question 1

    Thermal Properties of Matter. Asked once: 2021 Paper 6

    13
    A bimetallic strip consists of metals AA and BB. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold bath, it will:

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  2. Question 2

    Thermodynamics. Asked once: 31 Jan 2023

    103
    A hypothetical gas expands adiabatically such that its volume changes from 8 litres to 27 litres. If the ratio of final pressure of the gas to initial pressure of the gas is 1681\frac{16}{81}. Then the ratio of CpCv\frac{Cp}{Cv} will be.

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  3. Question 3

    Units and Measurements. Asked once: 6 Apr 2024

    93
    In finding out refractive index of glass slab the following observations were made through travelling microscope 50 vernier scale division == 49 MSD; 20 divisions on main scale in each cmcm For mark on paper
    MSR=8.45 cm,VC=26MSR = 8.45\text{ }cm,VC = 26
    For mark on paper seen through slab
    MSR=7.12 cm,VC=41MSR = 7.12\text{ }cm,VC = 41
    For powder particle on the top surface of the glass slab
    MSR=4.05 cm,VC=1MSR = 4.05\text{ }cm,VC = 1
    (MSR=(MSR = Main Scale Reading, VC == Vernier Coincidence) Refractive index of the glass slab is:

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  4. Question 4

    Work, Energy and Power. Asked once: 10 Apr 2023

    22
    A closed circular tube of average radius 15 cm15\text{ }cm, whose inner walls are rough, is kept in vertical plane. A block of mass 1 kg1\text{ }kg just fit inside the tube. The speed of block is 22 m/s22\text{ }m/s, when it is introduced at the top of tube. After completing five oscillations, the block stops at the bottom region of tube. The work done by the tube on the block is___J. [Given g=10 m/s2g = 10\text{ }m/s^{2} ]

  5. Question 5

    Atoms. Asked once: 27 Jun 2022

    108
    Given below are two statements: Statement I : In hydrogen atom, the frequency of radiation emitted when an electron jumps from lower energy orbit (E1)\left( E_{1} \right) to higher energy orbit (E2)\left( E_{2} \right), is given as hf=E1−E2hf =E_{1}-E_{2}. Statement-II: The jumping of electron from higher energy orbit (E2)\left( E_{2} \right) to lower energy orbit (E1)\left( E_{1} \right) is associated with frequency of radiation given as ff =(E2−E1)/h=\left( E_{2}-E_{1} \right)/h This condition is Bohr's frequency condition. In the light of the above statements, choose the correct answer from the options given below:

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