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Day 136: JEE Mains Physics

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

  1. Question 1

    Ray Optics. This type asked 2 times: 27 Jun 2022, 29 Jul 2022. This one: 29 Jul 2022 See all 2 of this type

    110
    Light enters from air into a given medium at an angle of 45∘45^{\circ} with interface of the air-medium surface. After refraction, the light ray is deviated through an angle of 15∘15^{\circ} from its original direction. The refractive index of the medium is:

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  2. Question 2

    Kinetic Theory. This type asked 2 times: 14 Jun 2022, 28 Jul 2022. This one: 28 Jul 2022 See all 2 of this type

    98
    A vessel contains 14 g14\text{ }g of nitrogen gas at a temperature of 27∘C27^{\circ}C. The amount of heat to be transferred to the gas to double the r.m.s. speed of its molecules will be : (Take R=8.32 J mol−1K−1R = 8.32\text{ }J{\text{ }mol}^{- 1}K^{- 1})

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  3. Question 3

    Electrostatics. This type asked 2 times: 2021 Paper 2, 27 Jul 2022. This one: 27 Jul 2022 See all 2 of this type

    10
    Two identical positive charges QQ each are fixed at a distance of ' 2a2a ' apart from each other. Another point charge q0q_{0} with mass ' mm ' is placed at midpoint between two fixed charges. For a small displacement along the line joining the fixed charges, the charge q0q_{0} executes SHM. The time period of oscillation of charge q0q_{0} will be:

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  4. Question 4

    Moving Charges and Magnetism. This type asked 2 times: 2021 Paper 19, 27 Jul 2022. This one: 27 Jul 2022 See all 2 of this type

    103
    A cyclotron is used to accelerate protons. If the operating magnetic field is 1.0 T1.0\text{ }T and the radius of the cyclotron 'dees' is 60 cm60\text{ }cm, the kinetic energy of the accelerated protons in MeVMeV will be: [use mp=1.6×10−27 kg,e=1.6×10−19Cm_{p}= 1.6 \times10^{- 27}\text{ }kg,e = 1.6 \times10^{- 19}C ]

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  5. Question 5

    Waves. This type asked 2 times: 2021 Paper 22, 27 Jul 2022. This one: 27 Jul 2022 See all 2 of this type

    117
    A wire of length 30 cm30\text{ }cm, stretched between rigid supports, has it's nth n^{\text{th~}} and (n+1)th (n + 1)^{\text{th~}} harmonics at 400 Hz400\text{ }Hz and 450 Hz450\text{ }Hz, respectively. If tension in the string is 2700 N2700\text{ }N, it's linear mass density is........ kg/mkg/m