Physics-
General
Easy
Question
A soap bubble has radius R and thickness d 
as shown. It colapses into a spherical drop. The ratio of excess pressure in the drop to the excess pressure inside the bubble is
- None
The correct answer is:
Related Questions to study
physics-
Equal volumes of two immiscible liquids of densities r and 2r are filled in a vessel as shown in figure. Two small holes are punched at depth h/2 and 3h/2 from the surface of lighter liquid. If v1 and v2 are the velocities of a flux at these two holes, then v1/v2 is :
Equal volumes of two immiscible liquids of densities r and 2r are filled in a vessel as shown in figure. Two small holes are punched at depth h/2 and 3h/2 from the surface of lighter liquid. If v1 and v2 are the velocities of a flux at these two holes, then v1/v2 is :
physics-General
physics-
The diagram shows three concentric conducting spherical shells having radii T, 2R and 3R. The initial potential of each shell is as mentioned in the figure. If the inner most shell is earth then the charge present on its outer surface would be equal to
The diagram shows three concentric conducting spherical shells having radii T, 2R and 3R. The initial potential of each shell is as mentioned in the figure. If the inner most shell is earth then the charge present on its outer surface would be equal to
physics-General
physics-
The variation of gravitational field E and potential f as a function of x from the center of a uniform spherical mass distribution of radius R is correctly represented, from the following plots, by
The variation of gravitational field E and potential f as a function of x from the center of a uniform spherical mass distribution of radius R is correctly represented, from the following plots, by
physics-General
physics-
A (nonrotating) star collapses onto itself from an initial radius Ri with its mass remaining unchanged. Which curve in figure best gives the gravitational acceleration ag on the surface of the star as a function of the radius of the star during the collapse?
A (nonrotating) star collapses onto itself from an initial radius Ri with its mass remaining unchanged. Which curve in figure best gives the gravitational acceleration ag on the surface of the star as a function of the radius of the star during the collapse?
physics-General
physics-
Inside a charged thin conducting spherical shell of radius R, a point charge +Q is placed as shown in figure. The potential of the shell would be
Inside a charged thin conducting spherical shell of radius R, a point charge +Q is placed as shown in figure. The potential of the shell would be
physics-General
Physics-
Two objects of masses m and 4m are at rest at an infinite separation. They move towards each other under mutual gravitational attraction. If G is the universal gravitational constant, then at a separation r
Two objects of masses m and 4m are at rest at an infinite separation. They move towards each other under mutual gravitational attraction. If G is the universal gravitational constant, then at a separation r
Physics-General
physics-
A spherical hole of radius R 2 is excavated from the asteroid of mass M as shown in the figure. The gravitational acceleration at a point on the surface of the asteroid just above the excavation is
A spherical hole of radius R 2 is excavated from the asteroid of mass M as shown in the figure. The gravitational acceleration at a point on the surface of the asteroid just above the excavation is
physics-General
physics-
A point negative charge – Q is placed at a distance r from a dipole with dipole moment P as shown in figure. The force acting on the charge – Q is
A point negative charge – Q is placed at a distance r from a dipole with dipole moment P as shown in figure. The force acting on the charge – Q is
physics-General
physics-
A conducting sphere of radius R and charge Q is placed near a uniformly charged . Then 
non conducting infinitely large thin plate having surface charge density find the potential at point A (on the surface of sphere) due to charge on sphere (here
)
A conducting sphere of radius R and charge Q is placed near a uniformly charged . Then non conducting infinitely large thin plate having surface charge density find the potential at point A (on the surface of sphere) due to charge on sphere (here)
physics-General
physics-
We have two electric dipoles. Each dipole consists of two equal and opposite point charges at the end of an insulating rod of length d. The dipoles are placed along the x-axis at a large distance r apart oriented as shown below:
The dipole on the left
We have two electric dipoles. Each dipole consists of two equal and opposite point charges at the end of an insulating rod of length d. The dipoles are placed along the x-axis at a large distance r apart oriented as shown below:
The dipole on the left
physics-General
physics-
An electric dipole, consisting of two equal and opposite point charges at the ends of a insulating rod, is placed in the electric field of a stationary positive point charge, as shown. The dipole is free to move. The dipole will
An electric dipole, consisting of two equal and opposite point charges at the ends of a insulating rod, is placed in the electric field of a stationary positive point charge, as shown. The dipole is free to move. The dipole will
physics-General
physics-
The field line to the right is a field line of the electric field, then its representation can be
The field line to the right is a field line of the electric field, then its representation can be
physics-General
Physics-
A particle of mass 4 kg moves between two points A and B on a smooth horizontal surface under the action of two forces such that when it is at a point P, the forces are 2
A N and 2B N. If the particle is released from rest at A, find the time it takes to travel a quarter of the way from A to B.
A particle of mass 4 kg moves between two points A and B on a smooth horizontal surface under the action of two forces such that when it is at a point P, the forces are 2A N and 2B N. If the particle is released from rest at A, find the time it takes to travel a quarter of the way from A to B.
Physics-General
physics-
In the figure shown, two identical discs of radius R each are placed on a smooth horizontal plane. Thread unwraps without slack from discs when they move away from each other. At any instant acceleration of centres of disc A and B are a2 and a1 respectively in opposite direction while their angular acceleration are a2 and a1 respectively. If string unwraps from discs without slipping then
In the figure shown, two identical discs of radius R each are placed on a smooth horizontal plane. Thread unwraps without slack from discs when they move away from each other. At any instant acceleration of centres of disc A and B are a2 and a1 respectively in opposite direction while their angular acceleration are a2 and a1 respectively. If string unwraps from discs without slipping then
physics-General
physics-
A uniform disc of mass M and radius R is supported vertically by a pivot at its periphery as shown. A particle of mass M is fixed to the rim and raised to the highest point above the centre. The system is then released from rest and it can rotate about its pivot freely. The angular speed of the system when the attached object is directly beneath the pivot is
A uniform disc of mass M and radius R is supported vertically by a pivot at its periphery as shown. A particle of mass M is fixed to the rim and raised to the highest point above the centre. The system is then released from rest and it can rotate about its pivot freely. The angular speed of the system when the attached object is directly beneath the pivot is
physics-General
