A flat dielectric disc of radius `R` carries an exces charge on its surface. The surface charge density `sigma`. The disc rotastes about an axis perpendicular to its lane passing thrugh the centre with angulasr velocity `omega`. Find the toruque on the disc if it is placed in a uniform magnetic field `B` directed perpendicular to the rotation axis.

A flat dielectric disc disc of radius R carries an excess charge on its surface. The surface charge density is sigma . The disc rotates about an axis perpendicular to its plane passing through the center with angular velocity omega . Find the magnitude of the torque on the disc if it is placed in a uniform magnetic field whose strength is B which is directed perpendicular to the axis of rotation

Radius of gyration of disc rotating about an axis perpendicular to its plane passing through its centre is (If R is the radius of disc)

Radius of gyration of disc rotating about an axis perpendicular to its plane passing through through its centre is (If R is the radius of disc)

A flat insulating disc of radius 'a' carries an excess charge on its surface is of surface charge density sigma C//m^(2) . Consider disc to rotate around the axis passing through its centre and perpendicular to its plane with angular speed omega rad/s. If magnetic field vecB is directed perpendicular to the rotation axis, then find the torque acting on the disc.

A flat insulating disc of radius 'a' carries an excess charge on its surface is of surface charge density sigma C//m^(2) . Consider disc to rotate around the axis passing through its centre and perpendicular to its plane with angular speed omega rad/s. If magnetic field vecB is directed perpendicular to the rotation axis, then find the torque acting on the disc.