A metal disc of radius \(100\mathrm{cm}\) is rotated at a constant angular speed of \(60 \mathrm{rad} / \mathrm{s}\) in …

A metal disc of radius \(100\mathrm{cm}\) is rotated at a constant angular speed of \(60 \mathrm{rad} / \mathrm{s}\) in a plane at right angles to an external field of magnetic induction \(0.05 \mathrm{~Wb} / \mathrm{m}^2\). The emf induced between the centre and a point on the rim will be