JEE Mains Physics 2002-2019 Solved Video Solutions
In a radioactive material, fraction of active material remaining after time t is 9/16. The fraction that was remaining after t/2 is
18
Sep
In a radioactive material, fraction of active material remaining after time t is 9/16. The fraction that was remaining after t/2 is fraction of active material remaining after time t is 9/16. The fraction that was remaining after t/2 is In a radioactive material September 18, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions [...]
A wire of density 9 × 10^–3 kg cm^–3 is stretched between two clamps 1 m apart. The resulting strain in the wire is 4.9 × 10^–4. The lowest frequency of the transverse vibrations in the wire is (Young’s modulus of wire Y = 9 x 10^10 Nm^–2), (to the nearest integer),…….
18
Sep
A wire of density 9 × 10^–3 kg cm^–3 is stretched between two clamps 1 m apart. The resulting strain in the wire is 4.9 × 10^–4. The lowest frequency of the transverse vibrations in the wire is (Young’s modulus of wire Y = 9 x 10^10 Nm^–2), (to the nearest integer),……. area A and [...]
A particle of mass m is moving along the x-axis with initial velocity u^i . It collides elastically with a particle of mass 10 m at rest and then moves with half its initial kinetic energy (see figure). If sin θ1 =√ n sin θ2 then value of n is.
18
Sep
A particle of mass m is moving along the x-axis with initial velocity u^i . It collides elastically with a particle of mass 10 m at rest and then moves with half its initial kinetic energy (see figure). If sin θ1 =√ n sin θ2 then value of n is. area A and force F [...]
A light ray enters a solid glass sphere of refractive index μ = √ 3 at an angle of incidence 60°. The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is ….
18
Sep
A light ray enters a solid glass sphere of refractive index μ = √ 3 at an angle of incidence 60°. The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is …. area A and force F [...]
A square shaped hole of side I = a/2 carved out at a distance d = a/2 from the centre ‘O’ of a uniform circular disk of radius a. If the distance of the centre of mass of the remaining portion from O is −ax , value of X (to the nearest integer) is ………..
18
Sep
A square shaped hole of side I = a/2 carved out at a distance d = a/2 from the centre ‘O’ of a uniform circular disk of radius a. If the distance of the centre of mass of the remaining portion from O is −ax , value of X (to the nearest integer) is ……….. [...]
An ideal cell of emf 10 V is connected in circuit shown in figure. Each resistance is 2 Ω. The potential difference (in V) across the capacitor when it is fully charged is …..
18
Sep
An ideal cell of emf 10 V is connected in circuit shown in figure. Each resistance is 2 Ω. The potential difference (in V) across the capacitor when it is fully charged is ….. An ideal cell of emf 10 V is connected in circuit shown in figure. Each resistance is 2 Ω. The potential [...]
An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true?
18
Sep
An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true? An ideal gas in a closed container is slowly heated. As its temperature increases which of the following statements are true? September 18, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice [...]
Two uniform circular discs are rotating independently in the same direction around their common axis passing through their centres. The moment of inertia and angular velocity of the first disc are 0.1 kg-m^2 and 10 rad s–1 respectively while those for the second one are 0.2 kg-m^2 and 5 rad s–1 respectively. At some instant they get stuck together and start rotating as a single system about their common axis with some angular speed. The kinetic energy of the combined system is
18
Sep
Two uniform circular discs are rotating independently in the same direction around their common axis passing through their centres. The moment of inertia and angular velocity of the first disc are 0.1 kg-m^2 and 10 rad s–1 respectively while those for the second one are 0.2 kg-m^2 and 5 rad s–1 respectively. At some instant [...]
The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements is/are true for this motion?
18
Sep
The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements is/are true for this motion? The displacement time graph of a particle executing S.H.M is given in figure (sketch is schematic and not to scale) Which of the following statements [...]
A charge Q is distributed over two concentric hollow spheres of radii r and R (>r) such that the surface densities are equal and placed on the same axial points. Then the potential at the common centre is
18
Sep
A charge Q is distributed over two concentric hollow spheres of radii r and R (>r) such that the surface densities are equal and placed on the same axial points. Then the potential at the common centre is area A and force F are chosen as fundamental units If speed (V) then the dimension of [...]