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Day 395: JEE Mains Physics

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

  1. Question 1

    Alternating Current. Asked once: 2021 Paper 8 (same type asked 5 times) See all 5 of this type

    19
    What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved?

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  2. Question 2

    Waves. Asked once: 2021 Paper 19 (same type asked 5 times) See all 5 of this type

    21
    Two waves are simultaneously passing through a string and their equations are : y1=A1sin⁡k(x−vt),y2=A2sin⁡k(x−vt+x0)y_{1}=A_{1}\sin k(x - vt),y_{2}=A_{2}\sin k\left( x - vt +x_{0} \right). Given amplitudes A1=12 mmA_{1}= 12\text{ }mm and A2=5 mmA_{2}= 5\text{ }mm, x0=3.5 cmx_{0}= 3.5\text{ }cm and wave number k=6.28 cm−1k = 6.28{\text{ }cm}^{- 1}. The amplitude of resulting wave will be ______ mmmm.

  3. Question 3

    Oscillations. Asked once: 27 Jun 2022 (same type asked 4 times) See all 4 of this type

    15
    The displacement of simple harmonic oscillator after 3 seconds starting from its mean position is equal to half of its amplitude. The time period of harmonic motion is:

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  4. Question 4

    Motion in a Plane. Asked once: 26 Jul 2022 (same type asked 4 times) See all 4 of this type

    19
    Two projectile thrown at 30∘30^{\circ} and 45∘45^{\circ} with the horizontal respectively, reach the maximum height in same time. The ratio of their initial velocities is

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  5. Question 5

    Moving Charges and Magnetism. Asked once: 2021 Paper 3 (same type asked 4 times) See all 4 of this type

    9
    A proton, a deuteron and an α\alpha particle are moving with same momentum in a uniform magnetic field. The ratio of magnetic forces acting on them is ____\_\_\_\_ and their speeds are in the ratio ____\_\_\_\_.

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