PYQ Vault

Day 402: JEE Mains Physics

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

  1. Question 1

    Moving Charges and Magnetism. Asked once: 24 Jan 2023 (same type asked 8 times) See all 8 of this type

    94
    A long solenoid is formed by winding 70 turns cm−1cm^{- 1}. If 2.0 A2.0\text{ }A current flows, then the magnetic field produced inside the solenoid is (μ0=4π×10−7TmA−1)\left( \mu_{0}= 4\pi \times10^{- 7}TmA^{- 1} \right)

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  2. Question 2

    Mechanical Properties of Fluids. Asked once: 11 Apr 2023 (same type asked 7 times) See all 7 of this type

    91
    Eight equal drops of water are falling through air with a steady speed of 10 cm/s10\text{ }cm/s. If the drops coalesce, the new velocity is: -

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  3. Question 3

    Motion in a Plane. Asked once: 25 Jun 2022 (same type asked 7 times) See all 7 of this type

    91
    Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Two identical balls A and B thrown with same velocity ' uu ' at two different angles with horizontal attained the same range RR. If AA and BB reached the maximum height h1h_{1} and h2h_{2} respectively, then R=4h1 h2R= 4\sqrt{h_{1}{\text{ }h}_{2}} Reason R: Product of said heights.
    h1 h2=(u2sin⁡2θ2 g)⋅(u2cos⁡2θ2 g)h_{1}{\text{ }h}_{2}=\left( \frac{u^{2}\sin^{2}\theta}{2\text{ }g} \right)\cdot\left( \frac{u^{2}\cos^{2}\theta}{2\text{ }g} \right)
    Choose the CORRECT answer:

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  4. Question 4

    Alternating Current. Asked once: 25 Jun 2022 (same type asked 7 times) See all 7 of this type

    102
    A sinusoidal voltage V(t)=210sin⁡3000tV(t) = 210\sin3000t volt is applied to a series LCR circuit in which L=10L = 10 mH,C=25μFmH,C = 25\mu F and R=100ΩR = 100\Omega. The phase difference (Φ)(\Phi) between the applied voltage and resultant current will be :

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  5. Question 5

    Atoms. Asked once: 25 Jan 2023 (same type asked 7 times) See all 7 of this type

    22
    The wavelength of the radiation emitted is λ0\lambda_{0} when an electron jumps from the second excited state to the first excited state of hydrogen atom. If the electron jumps from the third excited state to the second orbit of the hydrogen atom, the wavelength of the radiation emitted will be 20xλ0\frac{20}{x}\lambda_{0}. The value of xx is