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Day 539: JEE Mains Physics

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

  1. Question 1

    Motion in a Plane. Asked once: 11 Apr 2023

    29
    A projectile fired at 30∘30^{\circ} to the ground is observed to be at same height at time 3 s3\text{ }s and 5 s5\text{ }s after projection, during its flight. The speed of projection of the projectile is______ ms−1ms^{- 1}(Given g=10 m s−2g = 10\text{ }m{\text{ }s}^{- 2} )

  2. Question 2

    Motion in a Straight Line. Asked once: 6 Apr 2023

    100
    A particle starts with an initial velocity of 10.0 ms−110.0{\text{ }ms}^{- 1} along xx-direction and accelerates uniformly at the rate of 2.0 ms−22.0{\text{ }ms}^{- 2}. The time taken by the particle to reach the velocity of 60.0 ms−160.0{\text{ }ms}^{- 1} is

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  3. Question 3

    Moving Charges and Magnetism. Asked once: 2021 Paper 21

    12
    For full scale deflection of total 50 divisions, 50mV50mV voltage is required in galvanometer. The resistance of galvanometer if its current sensitivity is 2div/mA2div/mA will be:

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  4. Question 4

    Nuclei. Asked once: 2021 Paper 17

    14
    Consider the following statements: A. Atoms of each element emit characteristics spectrum. B. According to Bohr's Postulate, an electron in a hydrogen atom, revolves in a certain stationary orbit. C. The density of nuclear matter depends on the size of the nucleus. D. A free neutron is stable but a free proton decay is possible. E. Radioactivity is an indication of the instability of nuclei. Choose the correct answer from the options given below:

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  5. Question 5

    Oscillations. Asked once: 2021 Paper 24

    16
    A mass of 5 kg5\text{ }kg is connected to a spring. The potential energy curve of the simple harmonic motion executed by the system is shown in the figure. A simple pendulum of length 4 m4\text{ }m has the same period of oscillation as the spring system. What is the value of acceleration due to gravity on the planet where these experiments are performed?

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