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Day 378: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 2021 Paper 17 (same type asked 7 times) See all 7 of this type

    25
    A particle executes simple harmonic motion represented by displacement function as
    x(t)=Asin(ωt+ϕ)x(t) =Asin(\omega t+\phi)
    If the position and velocity of the particle at t=0 st = 0\text{ }s are 2 cm2\text{ }cm and 2ω cm s−12\omega\text{ }cm\text{ }s^{- 1} respectively, then its amplitude is x2 cmx\sqrt{2}\text{ }cm where the value of xx is

  2. Question 2

    Moving Charges and Magnetism. Asked once: 29 Jan 2024 (same type asked 7 times) See all 7 of this type

    114
    A charge of 4.0μC4.0\mu C is moving with a velocity of 4.0×106 ms−14.0 \times10^{6}{\text{ }ms}^{- 1} along the positive y-axis under a magnetic field B→\overrightarrow{B} of strength (2k^)T(2\widehat{k})T. The force acting on the charge is xi^Nx\widehat{i}N. The value of xx is ____

  3. Question 3

    Electromagnetic Induction. Asked once: 30 Jan 2023 (same type asked 7 times) See all 7 of this type

    116
    In an ac generator, a rectangular coil of 100 turns each having area 14×10−2 m214 \times10^{- 2}{\text{ }m}^{2} is rotated at 360rev/min about an axis perpendicular to a uniform magnetic field of magnitude 3.0 T3.0\text{ }T. The maximum value of the emf produced will be ____\_\_\_\_ V. (Take π=227\pi = \frac{22}{7})

  4. Question 4

    System of Particles and Rotational Motion. Asked once: 25 Jul 2022 (same type asked 7 times) See all 7 of this type

    5
    A solid cylinder and a solid sphere, having same mass MM and radius RR, roll down the same inclined plane from top without slipping. They start from rest. The ratio of velocity of the solid cylinder to that of the solid sphere, with which they reach the ground, will be:

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  5. Question 5

    Thermal Properties of Matter. Asked once: 2021 Paper 13 (same type asked 7 times) See all 7 of this type

    15
    In 5 min⁡5\text{ }\min, a body changes temperature from 75∘C75^{\circ}C to 65∘C65^{\circ}C at room temperature 25∘C25^{\circ}C. What temperature will it have after another 5 min⁡5\text{ }\min ?

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