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Day 440: JEE Mains Physics

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

  1. Question 1

    Nuclei. Asked once: 24 Jan 2026 S2

    11
    The binding energy for the following nuclear reactions are expressed in MeV .
     2He3+ 0n1→ 2He4+20MeV 2He4+ 0n1→ 2He5−0.9MeV\begin{gathered}\ _{2}He^{3}+\ _{0}n^{1}\rightarrow\ _{2}He^{4}+ 20MeV \\ \ _{2}He^{4}+\ _{0}n^{1}\rightarrow\ _{2}He^{5}- 0.9MeV\end{gathered}
    If X3,X4,X5X_{3},X_{4},X_{5} denote the stability of  2He3, 2He4\ _{2}He^{3},\ _{2}He^{4} and  2He5\ _{2}He^{5}, respectively, then the correct order is :

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  2. Question 2

    Oscillations. Asked once: 4 Apr 2026 S2

    10
    A uniform disc of radius R and mass M is free to oscillate about the axis A as shown in the figure. For small oscillations the time period is ____\_\_\_\_ . (g is acceleration due to gravity)

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  3. Question 3

    Ray Optics. Asked once: 2 Apr 2026 S1

    16
    Refer the figure given below. μ1\mu_{1} and μ2\mu_{2} are refractive indices of air and lens material. The height of image will be ____\_\_\_\_ cm.

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  4. Question 4

    Semiconductor Electronics. Asked once: 6 Apr 2026 S2

    18
    Refer to the logic circuit given below. For two inputs ( A=1, B=1A = 1,\text{ }B = 1 ) and ( A=0, B=1A = 0,\text{ }B = 1 ), output (Y) will be ____\_\_\_\_ .

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  5. Question 5

    System of Particles and Rotational Motion. Asked once: 6 Apr 2026 S2

    7
    Two identical bodies A and B of equal masses have initial velocities v→1=4i^m/s{\overrightarrow{v}}_{1}= 4\widehat{i}m/s and v→2=4j^m/s{\overrightarrow{v}}_{2}= 4\widehat{j}m/s respectively. The body A has acceleration a→1=6i^+6j^m/s2{\overrightarrow{a}}_{1}= 6\widehat{i}+ 6\widehat{j}m/s^{2} while the acceleration of the other body BB is zero. The centre of mass of the two bodies moves in ____\_\_\_\_ path.

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