Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Two rings having masses M nad 2 M, respectively , having the same radius are placed coaxially as shown in the figure.
05
Oct
Two rings having masses M nad 2 M, respectively , having the same radius are placed coaxially as shown in the figure. having the same radius are placed coaxially as shown in the figure. respectively Two rings having masses M nad 2 M October 5, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + [...]
A satellite of mass m is in an elliptical orbit around the earth. The speed of the satellite at its nearest position is (6GM)/(5r) where r is the perigee (nearest point) distance from the centre of the earth. It is desired to transfer the satellite to the circular orbit of radius equal to its apogee (farthest point) distance from the centre of the earth. The change in orbital speed required for this purpose is
05
Oct
A satellite of mass m is in an elliptical orbit around the earth. The speed of the satellite at its nearest position is (6GM)/(5r) where r is the perigee (nearest point) distance from the centre of the earth. It is desired to transfer the satellite to the circular orbit of radius equal to its apogee [...]
Imagine that you are in a spacecraft orbiting around the earth in a circle of radius 7000 km (from the centre of the earth). If you decrease the magnitude of mechanical energy of the spacecraft − earth system by 10% by firing the rockets, then what is the greatest height you can take your spacecraft above the surface of the earth? [Re = 6400 km]
05
Oct
Imagine that you are in a spacecraft orbiting around the earth in a circle of radius 7000 km (from the centre of the earth). If you decrease the magnitude of mechanical energy of the spacecraft − earth system by 10% by firing the rockets, then what is the greatest height you can take your spacecraft [...]
The percentage change in the acceleration of the earth towards the Sun from a total eclipse of the Sun to the point where the Moon is on a side of earth directly opposite to the Sun is
05
Oct
The percentage change in the acceleration of the earth towards the Sun from a total eclipse of the Sun to the point where the Moon is on a side of earth directly opposite to the Sun is The percentage change in the acceleration of the earth towards the Sun from a total eclipse of the [...]
A comet is highly elliptical orbit around the Sun. The period of the comet’s orbit is 90 days. Some statements are given regarding the collision between the comet and the earth. Mark the correct statement. [Mass of the Sun=2×10 30 kg, mean distance between the earth and the Sun = 1.5 × 10^ 11 m]
05
Oct
A comet is highly elliptical orbit around the Sun. The period of the comet’s orbit is 90 days. Some statements are given regarding the collision between the comet and the earth. Mark the correct statement. [Mass of the Sun=2×10 30 kg, mean distance between the earth and the Sun = 1.5 × 10^ 11 m] [...]
A point P lies on the axis of a fixed ring of mass M and radius R, at a distance 2R from its centre O. A small particle starts from P and reaches O under gravitational attraction only. Its speed at O will be
05
Oct
A point P lies on the axis of a fixed ring of mass M and radius R, at a distance 2R from its centre O. A small particle starts from P and reaches O under gravitational attraction only. Its speed at O will be A point P lies on the axis of a fixed ring [...]
The gravitational potential of two homogenous spherical shells A and B of same surface density at their respective centres are in the ratio 3:4. If the two shells coalesce into a single one such that surface charge density remains the same, then the ratio of potential at an internal point of the new shell to shell A is equal to
05
Oct
The gravitational potential of two homogenous spherical shells A and B of same surface density at their respective centres are in the ratio 3:4. If the two shells coalesce into a single one such that surface charge density remains the same, then the ratio of potential at an internal point of the new shell to [...]
A satellite is seen after every 8 hours over the equator at a place on the earth when its sense of rotation is opposite to the earth. The time interval after which it can be seen at the same place when the sense of rotation of earth and satellite is same will be:
05
Oct
A satellite is seen after every 8 hours over the equator at a place on the earth when its sense of rotation is opposite to the earth. The time interval after which it can be seen at the same place when the sense of rotation of earth and satellite is same will be: A planet [...]
A cavity of radius R/2 is made inside a solid sphere of radius R. The centre of the cavity is located at a distance R/2 from the centre of the sphere. The gravitational force on a particle of a mass ‘m’ at a distance R/2 from the centre of the sphere on the line joining both the centres of sphere and cavity is (opposite to the centre of cavity). [Here g = GM/R^2, where M is the mass of the solid sphere]
05
Oct
A cavity of radius R/2 is made inside a solid sphere of radius R. The centre of the cavity is located at a distance R/2 from the centre of the sphere. The gravitational force on a particle of a mass ‘m’ at a distance R/2 from the centre of the sphere on the line joining [...]
A tunnel is dug along the diameter of the earth. There is particle of mass m at the centre of the tunnel. Find the minimum velocity given to the particle so that is just reaches to the surface of the earth. (R= radius of earth)
05
Oct
A tunnel is dug along the diameter of the earth. There is particle of mass m at the centre of the tunnel. Find the minimum velocity given to the particle so that is just reaches to the surface of the earth. (R= radius of earth) A planet is revolving around the Sun in an elliptical [...]