PYQ Vault
EbooksTutor

Day 285: JEE Mains Physics

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

  1. Question 1

    Electrostatics. Asked once: 1 Feb 2024 (same type asked 4 times) See all 4 of this type

    102
    C1C_{1} and C2C_{2} are two hollow concentric cubes enclosing charges 2Q2Q and 3Q3Q respectively as shown in figure. The ratio of electric flux passing through C1C_{1} and C2C_{2} is:

    Tap an option to check your answer.

  2. Question 2

    Ray Optics. Asked once: 23 Jan 2026 S2 (same type asked 4 times) See all 4 of this type

    15
    A prism of angle 75∘75^{\circ} and refractive index 3\sqrt{3} is coated with thin film of refractive index 1.5 only at the back exit surface. To have total internal reflection at the back exit surface the incident angle must be ____\_\_\_\_ . (sin⁡15∘=0.25\sin15^{\circ}= 0.25 and sin⁡25∘=0.43\sin25^{\circ}= 0.43 )

    Tap an option to check your answer.

  3. Question 3

    Thermodynamics. Asked once: 27 Jan 2024 (same type asked 4 times) See all 4 of this type

    10
    0.08 kg0.08\text{ }kg air is heated at constant volume through 5∘C5^{\circ}C. The specific heat of air at constant volume is 0.17kcal/kg∘C0.17kcal/kg^{\circ}C and J=4.18J = 4.18 joule /cal/cal. The change in its internal energy is approximately.

    Tap an option to check your answer.

  4. Question 4

    Electromagnetic Waves. Asked once: 2021 Paper 19 (same type asked 4 times) See all 4 of this type

    6
    A light beam is described by E=800sin⁡ω(t−xC)E = 800\sin\omega\left( t -\frac{x}{C} \right) .An electron is allowed to move normal to the propagation of light beam with a speed of 3×1073 \times10^{7} ms−1ms^{- 1}. What is the maximum magnetic force exerted on the electron?

    Tap an option to check your answer.

  5. Question 5

    Electrostatics. Asked once: 30 Jan 2023 (same type asked 4 times) See all 4 of this type

    3
    Two isolated metallic solid spheres of radii RR and 2R2R are charged such that both have same charge density σ\sigma. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is σ′\sigma^{'}. The ratio σ′σ\frac{\sigma^{'}}{\sigma} is:

    Tap an option to check your answer.