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A spherical hole of radius R2 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
The correct answer is:
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A conducting sphere of radius R and a concentric thick spherical shell of inner radius 2R and outer radius 3R is shown in figure. A charge +10Q is given to the shell and inner sphere is earthed. Then charge on inner sphere is
A conducting sphere of radius R and a concentric thick spherical shell of inner radius 2R and outer radius 3R is shown in figure. A charge +10Q is given to the shell and inner sphere is earthed. Then charge on inner sphere is
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A charge Q0 is placed at centre of spherical cavity of a conductor and another charge Q, is placed outside the conductor. The correct statement is:
A charge Q0 is placed at centre of spherical cavity of a conductor and another charge Q, is placed outside the conductor. The correct statement is:
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Consider the arrangement of two concentric conducting shells with radii a & b respectively as shown in the diagram. The inner shell carries a charge Q. The outer shell is grounded
Consider the arrangement of two concentric conducting shells with radii a & b respectively as shown in the diagram. The inner shell carries a charge Q. The outer shell is grounded
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Two concentric shells R and 2R charges qA and qB and potentials 2V and (3/2)V A' respectively. Now shell B is earthed and let charges q B' and q . Then
Two concentric shells R and 2R charges qA and qB and potentials 2V and (3/2)V A' respectively. Now shell B is earthed and let charges q B' and q . Then
physics-General
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On a conductor of nonuniform curvature, the charge
On a conductor of nonuniform curvature, the charge
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In the figure below, a point charge +Q1 is at the center of an imaginary spherical gaussian surface and another point charge + Q2 is outside of the gaussian surface. Point P is on the surface of the sphere. Which one of the following statements is true? 
In the figure below, a point charge +Q1 is at the center of an imaginary spherical gaussian surface and another point charge + Q2 is outside of the gaussian surface. Point P is on the surface of the sphere. Which one of the following statements is true?
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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
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
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A long capillary tube of radius ‘r’ is initially just vertically completely imerged inside a liquid of angle of contact 00 If the tube is slowly raised then relation between radius of curvature of miniscus inside the capillary tube and displacement (h) of tube can be represented by
A long capillary tube of radius ‘r’ is initially just vertically completely imerged inside a liquid of angle of contact 00 If the tube is slowly raised then relation between radius of curvature of miniscus inside the capillary tube and displacement (h) of tube can be represented by
physics-General
physics-
Equal volumes of two immiscible liquids of densities r and 2rare 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 2rare 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 :
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A gun throws a shell with a muzzle speed of 98 m/s. When the gun is elevated at 45°, the range is observed as 900m. Due to air resistance its range is decreased by ..
A gun throws a shell with a muzzle speed of 98 m/s. When the gun is elevated at 45°, the range is observed as 900m. Due to air resistance its range is decreased by ..
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A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at an angle of 30° with the horizontal. How far from the throwing point the ball be at a height of 10m from the ground ?
A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at an angle of 30° with the horizontal. How far from the throwing point the ball be at a height of 10m from the ground ?
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For a projectile the value which depends on the vertical component of velocity of projection?
For a projectile the value which depends on the vertical component of velocity of projection?
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A hose pipe lying on the ground shoots a stream of water upward at an angle of 60° to the horizontal at a speed of 20m/s The water strikes a wall 20m away at a height of.. (g=10m/s²)
A hose pipe lying on the ground shoots a stream of water upward at an angle of 60° to the horizontal at a speed of 20m/s The water strikes a wall 20m away at a height of.. (g=10m/s²)
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At the highest point on the trajectory of projectile its ..
At the highest point on the trajectory of projectile its ..
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A bomb is released by a horizontal flying aeroplane Then the trajectory of bomb is ...
A bomb is released by a horizontal flying aeroplane Then the trajectory of bomb is ...
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