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Day 445: JEE Mains Physics

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

  1. Question 1

    Motion in a Straight Line. Asked once: 28 Jan 2026 S2

    8
    A particle starts moving from time t=0t = 0 and its coordinate is given as x(t)=4t3−3tx(t) = 4t^{3}- 3t. (A) The particle returns to its original position (origin) 0.866 units later (B) The particle is 1 unit away from origin at its turning point. (C) Acceleration of the particle is non-negative. (D) The particle is 0.5 units away from origin at its turning point. (E) Particle never turns back as acceleration is non-negative. Choose the correct answer from the options given below:

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  2. Question 2

    Moving Charges and Magnetism. Asked once: 7 Apr 2025

    4
    Uniform magnetic fields of different strengths (B1\left( B_{1} \right. and B2B_{2} ), both normal to the plane of the paper exist as shown in the figure. A charged particle of mass m and charge q , at the interface at an instant, moves into the region 2 with velocity vv and returns to the interface. It continues to move into region 1 and finally reaches the interface. What is the displacement of the particle during this movement along the interface ? (Consider the velocity of the particle to be normal to the magnetic field and B2>B1B_{2}>B_{1} )

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  3. Question 3

    Nuclei. Asked once: 24 Jan 2026 S1

    13
    Given below are two statements: Statement I : For all elements, greater the mass of the nucleus, greater is the binding energy per nucleon. Statement II : For all elements, nuclei with less binding energy per nucleon transforms to nuclei with greater binding energy per nucleon. In the light of the above statements, choose the correct answer from the options given below:

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  4. Question 4

    Oscillations. Asked once: 2 Apr 2026 S2

    20
    The equation of motion of a particle is given by x=asin⁡(50t+π/3) cmx = a\sin(50t + \pi/3)\text{ }cm. The particle will come to rest at time t1t_{1} and it will have zero acceleration at time t2t_{2}. The t1t_{1} and t2t_{2} respectively are ____\_\_\_\_ .

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  5. Question 5

    Ray Optics. Asked once: 28 Jan 2026 S2

    3
    A biconvex lens is formed by using two thin planoconvex lenses, as shown in the figure. The refractive index and radius of curved surfaces are also mentioned in figure. When an object is placed on the left side of lens at a distance of 30 cm from the biconvex lens, the magnification of the image will be :

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