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Day 235: JEE Mains Physics

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

  1. Question 1

    Alternating Current. Asked once: 27 Jul 2022 (same type asked 2 times) See all 2 of this type

    24
    To light, a 50 W,100 V50\text{ }W,100\text{ }V lamp is connected, in series with a capacitor of capacitance 50πxμF\frac{50}{\pi\sqrt{x}}\mu F, with 200 V,50 Hz200\text{ }V,50\text{ }Hz AC source. The value of xx will be

  2. Question 2

    Magnetism and Matter. Asked once: 10 Apr 2023 (same type asked 2 times) See all 2 of this type

    24
    The current required to be passed through a solenoid of 15 cm15\text{ }cm length and 60 turns in order to demagnetise a bar magnet of magnetic intensity 2.4×103Am−12.4 \times10^{3}Am^{- 1} is___ A.

  3. Question 3

    Nuclei. Asked once: 4 Apr 2024 (same type asked 2 times) See all 2 of this type

    3
    Which of the following nuclear fragments corresponding to nuclear fission between neutron ( 01n)\left( \ _{0}^{1}n \right) and uranium isotope ( 92235U)\left( \ _{92}^{235}U \right) is correct:

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  4. Question 4

    Work, Energy and Power. Asked once: 14 Jun 2022 (same type asked 2 times) See all 2 of this type

    28
    A ball of mass 100 g100\text{ }g is dropped from a height h=h = 10 cm10\text{ }cm on a platform fixed at the top of vertical spring (as shown in figure). The ball stays on the platform and the platform is depressed by a distance h2\frac{h}{2}. The spring constant is _____ Nm−1Nm^{- 1}. (Use g=10 ms−2g = 10{\text{ }ms}^{- 2} )

  5. Question 5

    Motion in a Plane. Asked once: 27 Jan 2024 (same type asked 2 times) See all 2 of this type

    6
    A train is moving with a speed of 12 m/s12\text{ }m/s on rails which are 1.5 m1.5\text{ }m apart. To negotiate a curve radius 400 m400\text{ }m, the height by which the outer rail should be raised with respect to the inner rail is (Given, g=g = 10 m/s210\text{ }m/s^{2} ):

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