respectively
A proton and an α-particle, having kinetic energies Kp and Kα, respectively, enter into a magnetic field at right angles. The ratio of the radii of trajectory of proton to that of α-particle is 2 : 1. The ratio of Kp : Kα is :
29
Sep
A proton and an α-particle, having kinetic energies Kp and Kα, respectively, enter into a magnetic field at right angles. The ratio of the radii of trajectory of proton to that of α-particle is 2 : 1. The ratio of Kp : Kα is : A proton and an α-particle enter into a magnetic field [...]
Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are VA and VB, respectively, then VA/VB = n/4. The value of n is :
23
Sep
Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are VA and VB, respectively, then VA/VB = n/4. The value of n is : Planet A has mass M and radius R. Planet [...]
Consider a sphere of radius R which carries a uniform charge density ρ. If a sphere of radius R/2 is carved out of it, as shown, the ratio vector|EA/EB| of magnitude of electric field vector EA and vector EB, respectively, at points A and B due to the remaining portion is :
23
Sep
Consider a sphere of radius R which carries a uniform charge density ρ. If a sphere of radius R/2 is carved out of it, as shown, the ratio vector|EA/EB| of magnitude of electric field vector EA and vector EB, respectively, at points A and B due to the remaining portion is : as shown at [...]
The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:
19
Sep
The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are: coercivity and saturation of the material are: respectively The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity September 19, 2021 Category: JEE Mains Physics 2002-2019 Solved [...]
Molecules of an ideal gas are known to have three translational degrees of freedom and two rotational degrees of freedom. The gas is maintained at a temperature of T. The total internal energy, U of a mole of this gas, and the value of γ=( Cp/Cv) are given, respectively, by
19
Sep
Molecules of an ideal gas are known to have three translational degrees of freedom and two rotational degrees of freedom. The gas is maintained at a temperature of T. The total internal energy, U of a mole of this gas, and the value of γ=( Cp/Cv) are given, respectively, by and the value of γ=( [...]
Consider two uniform discs of the same thickness and different radii R1 = R and R2 = αR made of the same material. If the ratio of their moments of inertia I1 and I2, respectively, about their axes is I1 : I2 = 1 : 16 then the value of α is
18
Sep
Consider two uniform discs of the same thickness and different radii R1 = R and R2 = αR made of the same material. If the ratio of their moments of inertia I1 and I2, respectively, about their axes is I1 : I2 = 1 : 16 then the value of α is about their axes [...]
Starting from the origin at time t = 0, with initial velocity 5j ms^-1, a particle moves in the x-y plane with a constant acceleration of (10i + 4j) ms^-2. At time t, its coordinates are (20 m, y0 m). The values of t and y0 are, respectively
18
Sep
Starting from the origin at time t = 0, with initial velocity 5j ms^-1, a particle moves in the x-y plane with a constant acceleration of (10i + 4j) ms^-2. At time t, its coordinates are (20 m, y0 m). The values of t and y0 are, respectively a particle moves in the x-y plane [...]
Two isolated conducting spheres S1 and S2 of radius 3/2R and 1/3R have 12 μC and –3 μC charges, respectively, and are at a large distance from each other. They are now connected by a conducting wire. A long time after this is done the charges on S1 and S2 are respectively
18
Sep
Two isolated conducting spheres S1 and S2 of radius 3/2R and 1/3R have 12 μC and –3 μC charges, respectively, and are at a large distance from each other. They are now connected by a conducting wire. A long time after this is done the charges on S1 and S2 are respectively and are at [...]
Two identical strings X and Z made of same material have tension TX and TZ in them. If their fundamental frequencies are 450 Hz and 300 Hz, respectively, then the ratio TX/TZ is
16
Sep
Two identical strings X and Z made of same material have tension TX and TZ in them. If their fundamental frequencies are 450 Hz and 300 Hz, respectively, then the ratio TX/TZ is respectively then the ratio TX/TZ is Two identical strings X and Z made of same material have tension TX and TZ in [...]
An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively :
16
Sep
An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively : An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of [...]