Physics

We have two spheres, one of which is hollow and other is solid. They have identical mass and moment of inertia about its tangent. The ratio of their radii is given by

Two balls are thrown vertically upward simultaneously. While they are in air, the acceleration of their centre of mass

A uniform chain of length L and mass M is lying on a table and 1/4^th of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, the work required to pull the hanging part back on the table

If a ball of mass 4 kg moving with velocity of 3 m/s collides elastically head on with another ball of mass 6 kg which is at rest, then the ratio of speed of second ball to first after collision will be

Two blocks of mass 10 kg and 5 kg are connected with a light string which passing over an ideal pulley attached with a fixed smooth wedge. If the system is released from rest, then the acceleration of the blocks will be

A body when dropped freely from certain height, reaches the ground in time t second. The average velocity during its journey is

If energy E, volume V and time T are taken as fundamental units, the dimensional formula of the force will be

The exchange particles responsible for nuclear weak interaction are

For real object match the corresponding entries of column-1 with column-2 (where m is the magnification produced by the mirror) :-

Assertion (A) - When constant current is passing through a conductor of variable area of cross section, electric field inside conductor is inversely proportional to cross sectional area.