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Day 278: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. Asked once: 10 Apr 2023 (same type asked 5 times) See all 5 of this type

    118
    A force of −Pk^- P\widehat{k} acts on the origin of the coordinate system. The torque about the point (2,−3)(2, - 3) is P(ai^+bj^)P(a\widehat{i}+ b\widehat{j}), the ratio of ab\frac{a}{b} is x2\frac{x}{2}. The value of xx is

  2. Question 2

    System of Particles and Rotational Motion. Asked once: 9 Apr 2024 (same type asked 5 times) See all 5 of this type

    115
    A circular disc reaches from top to bottom of an inclined plane of length ll. When it slips down the plane, it takes tsts. When it rolls down the plane then it takes (α2)1/2ts\left( \frac{\alpha}{2} \right)^{1/2}ts, where α\alpha is .............

  3. Question 3

    Nuclei. Asked once: 29 Jul 2022 (same type asked 5 times) See all 5 of this type

    119
    Two radioactive materials AA and BB have decay constants 25λ25\lambda and 16λ16\lambda respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of B to that of A will be "e" after a time 1aλ\frac{1}{a\lambda}. The value of a is

  4. Question 4

    Thermodynamics. Asked once: 2021 Paper 11 (same type asked 5 times) See all 5 of this type

    5
    If an ideal gas is taken through process ABAB then find work done on gas by external agent. Given curve ABAB is an ellipse.

    Tap an option to check your answer.

  5. Question 5

    Alternating Current. Asked once: 26 Jun 2022 (same type asked 5 times) See all 5 of this type

    29
    A 110 V,50 Hz110\text{ }V,50\text{ }Hz, AC source is connected in the circuit (as shown in figure). The current through the resistance 55Ω55\Omega, at resonance in the circuit, will be ____\_\_\_\_ A.