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Day 185: JEE Mains Physics

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

  1. Question 1

    Current Electricity. Asked once: 6 Apr 2024 (same type asked 4 times) See all 4 of this type

    9
    The value of unknown resistance (x) for which the potential difference between BB and DD will be zero in the arrangement shown, is:

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  2. Question 2

    Electromagnetic Waves. Asked once: 31 Jan 2024 (same type asked 4 times) See all 4 of this type

    10
    In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5×1010 Hz5 \times10^{10}\text{ }Hz and an amplitude of 50Vm−150Vm^{- 1}. The total average energy density of the electromagnetic field of the wave is : [Use ε0=8.85×10−12C2/Nm2\varepsilon_{0}= 8.85 \times10^{- 12}C^{2}/Nm^{2} ]

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  3. Question 3

    System of Particles and Rotational Motion. Asked once: 31 Jan 2024 (same type asked 4 times) See all 4 of this type

    115
    A body of mass ' mm ' is projected with a speed ' uu ' making an angle of 45∘45^{\circ} with the ground. The angular momentum of the body about the point of projection, at the highest point is expressed as 2mu3Xg\frac{\sqrt{2}mu^{3}}{Xg}. The value of ' XX ' is _____

  4. Question 4

    Motion in a Plane. Asked once: 31 Jan 2023 (same type asked 4 times) See all 4 of this type

    3
    The initial speed of a projectile fired from ground is uu. At the highest point during its motion, the speed of projectile is 32u\frac{\sqrt{3}}{2}u. The time of flight of the projectile is:

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  5. Question 5

    Ray Optics. Asked once: 14 Jun 2022 (same type asked 4 times) See all 4 of this type

    117
    A ray of light is incident at an angle of incidence 60∘60^{\circ} on the glass slab of refractive index 3\sqrt{3}. After refraction, the light ray emerges out from other parallel faces and lateral shift between incident ray and emergent ray is 43 cm4\sqrt{3}\text{ }cm. The thickness of the glass slab is ____\_\_\_\_ cmcm.