A vertical disc of diameter 10 cm makes 20 revolutions per second about a horizontal axis passing through its centre. A uniform magnetic field `10^(-1)` T acts perpendicular to the plane of the disc. Calculate the potential difference between its centre and rim in volts.

A vertical copper disc of diameter 20cm makes 10 revolution per second about a horizontal axis passing through its centre. A uniforjm magnetic field 10^(-2)T acts perpendicular to the plane of the disc. Calculate the potential defference between its centre and rim in volts.

A verticle copper disc of diameter 20 cm is rotating uniformly about a horizontal axis passing through its centre with angular speed 600 r.p.m. A uniform magnetic field of strength 10^-2T acts perpendicular to the plane of the disc. Calculate the potential difference between its centre and a point on the rim of the disc.

A copper disc of diameter 20 cm is rotating uniformly about its horizontal axis passing through the centre with angular frequency 600 rpm. A uniform magnetic field of strength 10^(-2)T acts perpendicular to the plane of the disc. Calculate the induced emf between its centre and a point on the rim of the disc.

Obtain an expression for radius of gyration about an axis passing through the centre of a uniform disc and perpendicular to the plane of the disc.

A circular copper disc of 10 cm radius rotates at 20 pi radian//sec about an axis through its centre and perdendicular to the disc. A uniform magnetic field of 0.2 T acts perpendicular to the disc. Calculate the potential difference developed between axis of the disc and the rim. What is the induced current if resistance of disc is 2 ohm ?

A circular copper disc 10 cm in radius rotates at 20pi rad/s about an axis through its centre and perpendicular to the disc. A uniform magnetic field of 0.2 T acts perpendicular to the disc. Calculate the potential difference developed between the axis of the disc and the rim.

A metal disc of radius R rotates with an angular velcoity omega about an axis perpendicular to its plane passing through its centre in a magnetic field B acting perpendicular to the plane of the disc. Calculate the induced emf between the rim and the axis of the disc.

A metal disc of radius R rotates with an angular velcoity omega about an axis perpendiclar to its plane passing through its centre in a magnetic field B acting perpendicular to the plane of the disc. Calculate the induced emf between the rim and the axis of the disc.

A metallic disc of radius 10 cm is rotating uniformly about a horizontal axis passing through its centre with angular velocity 10 revolution per second. A uniform magnetic field of intensity 10^(-2)T acts along the axis of the disc. Find the potential difference induced between the centre and the rim of the disc.