A smoothh disc is rotating with uniform angular speed `omega` about a fixed vertical axis passing through its centre and normal to its plane as shown. A small block of mass m is gently placed at the periphery of the disc. Then (pickup the correct alternative or alternatives)

A disc of mass m, radius r and carrying charge q, is rotating with angular speed omega about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

A disc of mass m, radius r and carrying charge q, is rotating with angular speed omega about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

A disc of mass m, radius r and carrying charge q, is rotating with angular speed omega about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

A uniform disc of radius a and mass m, is rotating freely with angular speed omega in a horizontal plane about a smooth fixed vertical axis through its centre. A particle, also of mass m, is suddenly attached to the rim of the disc of the disc and rotates with it. The new angular speed is

A uniform disc of radius 'a' and mass 'm' is rotating freely with angular speed omega in a horizontal plane about a smooth fixed vertical axis through its centre. A particle of mass 'm' is then suddenly attached to the rim of the disc and rotates with it. The new angular speed is

A uniform rod of mass m and length L lies radialy on a disc rotating with angular speed omega in a horizontal plane about vertical axis passing thorugh centre of disc. The rod does not slip on the disc and the centre of the rod is at a distance 2L from the centre of the disc. them the kinetic energy of the rod is

A uniform rod of mass m and length L lies radialy on a disc rotating with angular speed omega in a horizontal plane about vertical axis passing thorugh centre of disc. The rod does not slip on the disc and the centre of the rod is at a distance 2L from the centre of the disc. them the kinetic energy of the rod is

A circular disc is rotating in horizontal plane about vertical axis passing through its centre without friction with a person standing on the disc at its edge. If the person gently walks to centre of disc then its angular velocity